BABEL :

A Glossary of Computer Oriented Abbreviations and Acronyms


Version 05A

Copyright © 1989-2005...Irving & Richard Kind...All Rights Reserved

BABEL is now 16 years old... Spread the word, so everyone may enjoy the glossary and benefit.

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A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
Appendix A Appendix B Appendix C NOTES

     READ THIS PAGE FIRST!

     First compiled when I became frustrated while reading magazine
articles, help wanted ads and equipment for sale brochures....all
pertaining to computers....where the following Abbreviations and
Acronyms were used and their meanings were either not known to me
or were not immediately available.  I have actually seen (or have
been told about) these combinations of letters used at one time or
another in magazines, newspapers, handbooks, etc.  They apply to
personal computers, multimedia, communications, programming,
networking, etc......you name it.  This glossary can never be
considered complete so look over the entries and let me have your
feedback.  If you find errors or if you can suggest additions, they
will be most welcome (See NOTE 1).  If you can help, you have my
thanks in advance.

     Keep BABEL on your hard drive or floppy disk or print it and
keep it on your desk (See NOTE 2).  Either way, you will have an
outstanding reference, immediately available.  BABEL is revised
three times a year, in January, May and September so as to keep you
up-to-date.  See APPENDIX A for methods that may be used to
download BABEL in either TEXT, HTML or PALM Format.

     Letter groups followed with " * " were used before 1965.  At
some of these, historical information is noted.  For brief
interpretations of "smiley faces" and other informal expressions
used in electronic mail messages, see APPENDIX B.  For a partial
list of Country Domain Names, see APPENDIX C.

     BABEL is not in the public domain.  It is free for personal use.
When you download it, you agree to the following:  You will only
retain BABEL in its entirety and not make ANY modifications, to
include:  This opening page, copyright information, version notices
and format.  You will not incorporate it into any other document,
publish it, sell it, mirror it, or place it on any intranet.  Any
questions concerning these restrictions should ONLY be made in
writing.  Send p-mail to address shown below.

     And please remember to ECAL.
                                         
         Irving Kind                     Additions, Corrections
         c/o K & D                       or Comments..Send e-mail
         One Church Lane                 to: BabelGlossary@erols.com
         Baltimore, MD  21208  USA       with word 'BABEL' in subject

        Jan 2005 version = 05A       Jan 2006 version = 06A
        May 2005 version = 05B       May 2006 version = 06B
        Sep 2005 version = 05C       Sep 2006 version = 06C

A...

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AA        Auto Answer
AAA	  Authentication, Authorization and Accounting
AAB       All-to-All Broadcast
AAC	  Advanced Audio Coding
AAL       Asynchronous Transfer Mode Adaption Layer
AAM	  Automatic Acoustic Management
AAP       Applications Access Point [DEC]
AARP      AppleTalk Address Resolution Protocol
AAS       All-to-All Scatter
AASP      ASCII Asynchronous Support Package
AAT       Average Access Time
AATP      Authorized Academic Training Program [Microsoft]
.ABA      Address Book Archive (file name extension) [Palm]
ABAP	  Advanced Business Application Programming [SAP]
ABC    *  Atanasoff-Berry Computer  (First digital
          calculating machine that used vacuum tubes)
ABEND     Abnormal End
ABI       Application Binary Interface
ABIOS     Advanced BIOS
ABIST     Automatic Built-In Self-Test [IBM]
ABLE      Adaptive Battery Life Extender +
	  Agent Building and Learning Environment [IBM]
ABM	  Asynchronous Balanced Mode
ABR       Available Bit Rate
ABRD	  Automatic Baud Rate Detection
ABRS      Automated Book Request System [British Library]
ABS       Address Book Synchronization [IBM] + Absolute
ABT       Abort
ABTS      ASCII Block Terminal Services
AC        Autocheck + Automatic Computer + Alternating Current
ACAP      Application Configuration Access Protocol
ACC       Accumulator
ACCMAIL   Accessing the Internet Via Email
ACD       Automatic Call Distribution
ACDI      Asynchronous Communications Device Interface
ACE       Access Control Encryption/Entry +
          Adobe Certified Expert +
          Advanced Computing Environment [SCO] +
          Adverse Channel Enhancements [Microcom] +
       *  Automatic Computing Engine
ACF       Access Control Field +
          Advanced Communications Function
ACH       Automated Clearing House
ACIAS     Automated Calibration Interval Analysis System
ACIS      American Committee for Interoperable Systems
ACK       Acknowledgment
ACL       Access Control List + Asynchronous Connection-Less (link)
ACM       Association for Computing Machinery
          Audio Compression Manager [Microsoft]
ACMS      Application Control Management System
ACP       Ancillary Control Program + Auxiliary Control Process
ACPI      Advanced Configuration and Power Interface
ACR       Allowed Cell Rate
ACROSS    Automated Cargo Release and Operations
          Service System
ACS       Access + Access Control Set + Access Control System +
        * Advanced Computer System [IBM] +
          Anti Curl System + Asynchronous Communication Server
ACSS      Audio Cascading Style Sheets
ACTLU	  Active Logical Unit
ACTPU	  Active Physical Unit
ACTS      Automated Computer Time Service
ACTT      Advanced Communication and Timekeeping Technology [Seiko]
ACU       Automatic Calling Unit
ACVC      Ada Compiler Validation Capacity
A/D       Analog to Digital
ADA       Automatic Data Acquisitions +
          (Programming Language named after Augusta Ada Lovelace)
ADB       Apple Desktop Bus
ADC       Adaptive Data Compression (protocol) [Hayes] +
          Add with Carry + Analog to Digital Converter
ADCCP     Advanced Data Communication Control Procedures/Protocol
ADD       Automatic Document Detection [WordPerfect]
ADF       Automatic Document Feeder +
          Automatically Defined Function
.ADF      Adapter Description File (file name extension)
ADI       AutoCad/AutoDesk Device Interface (driver)
ADIOS	  Automated Download and Installation of
	  Operating Systems [Queensland U.]
ADL       Address Data Latch
ADLAT     Adaptive Lattice Filter
ADLC      Adaptive Lossless Data Compression [IBM] +
          Asynchronous Data Link Control
ADMACS    Apple Document Management And Conrol System
ADMD      Administrative Management Domain [X.400]
.ADN      Add In Utility (file name extension)
          [Lotus 1-2-3] [LDC]
ADO       ActiveX Data Objects
ADP       AOLserver Dynamic Pages + Automatic Data Processing
ADPCM     Adaptive Differential Pulse Code Modulation
ADR       Address
ADS       Application Development Solutions [AT&T] +
          Application Development System +
          Automatic Distribution System
ADSC      Address Status Changed +
          Adobe Document Structuring Conventions
ADSI      Active Directory Service Interface [Microsoft] +
          Analog Display Services Interface
ADSL      (See DSL)
ADSP      AppleTalk Datastream Protocol
ADSR      Attack, Decay, Sustain, Release
ADT       Abstract Data Type + Application Data Types
ADU       Automatic Dialing Unit
AE        Above or Equal
AEB       Analog Expansion Bus [Dialogic]
AEC       Architecture, Engineering, Construction
AEM	  Asynchronous Event Mechanism
.AERO	  Aviation Industry (Domain Name) [Internet]
AES       Advanced Encryption Standard
AESA      ATM End System Address
AF        Auxiliary carry Flag
AFA       Accelerated File Access
AFC	  Antiferro-Magnetically Coupled (media) [IBM] +
          Automatic Font Change + Automatic Frequency Control
AFD       Automatic File Distribution
AFDW      Active Framework for Data Warehousing [Microsoft]
AFI       Authority and Format Identifier
AFII      Association for Font Information Interchange
AFIRM     Automated Fingerprint Image Reporting and Match
AFIS      Automated Fingerprint Identification System
.AFM      Adobe Font Metrics (file name extension) [Adobe Systems]
AFP       Advanced Function Presentation [IBM] +
          Advanced Function Printing + 
          Appletalk Filing Protocol [Macintosh]
AFS       Andrew File System (protocols)
AFTP      Advanced/Anonymous File Transfer Protocol
AGA       Advanced Graphics Adapter
AGC       Automatic Gain Control
AGP       Accelerated/Advanced Graphics Port
AGRAS     Antiglare-Antireflective-Antistatic
AGU       Address-Generation Unit
AH	  Authentication Header (protocol)
AHS       Automated Highway Systems
AI        Analog Input + Artificial Intelligence
AIA       Applications Integration Architecture [DEC]
AIC       AIXwindows Interface Composer [IBM]
AIFF      Audio Interchange File Format
AIIM      Association for Information and Image Management
AIM       AOL Instant Messenger
AIN       Advanced Intelligent Network [Bell Atlantic]
AIO	  All In One
AIP	  Application Infrastruture Provider
AIR       Architecture Implementation Review
AIS       Automated Identification System [NCIC] +
          Automated Information Systems
AISB      Association of Imaging Service Bureaus
AISP      Association of Information Systems Professionals
AIT       Advanced Intelligent Tape (drive) [Sony]
AIX       Advanced Interactive Executive [IBM]
ALAT	  Advanced Load Address Table
ALC       Arithmetic and Logic Circuits +
          Automatic Level Control
ALE       Address Latch Enable +
          Application Linking and Embedding
ALGOL     Algorithmic Oriented Language (see IAL)
ALIBI     Adaptive Location of Internetworked Bases
          of Information
ALICE	  Artificial Linguistic Internet Computer Entity
ALINK     Active Link [HTML]
ALIWEB    Archie Like Indexing in the Web [Internet]
ALN       Asynchronous Learning Network
ALOS	  Alternate Lighting Of Surfaces
ALP	  Automatic Language Processing
ALR       Advanced Logic Research, Inc.
ALT       Alternate (mode)
ALT.      Alternate lifestyle [USENET Newsgroup Category]
ALU       Arithmetic Logic Unit
AMA       Automatic Message Accounting
AMANDDA   Automated Messaging and Directory Assistance
AMASS     Archival Management and Storage System
AMD       Active Matrix Display + Advanced Micro Devices, Inc.
AMDD	  Agile Modelling Driven Development
AMI       Alternate Mark Inversion + American Megatrends, Inc. +
          Application Messaging Interface
AMMA      Advanced Memory Management Architecture [Everex Systems]
AMPL	  Algebraic/Applied Mathematical Programming Language
AMPS      Advanced Mobile Phone Service
AMR	  Audio Modem Riser
ANCOVA    Analysis of Covariance
ANDF      Architecture-Neutral Distribution Format
ANI       Automatic Number Identification
.ANI      Animated Cursor (file name extension) [Microsoft]
ANN       Artificial Neural Network
.ANN      Annotations (file name extension) [IBM]
ANOVA     Analysis Of Variance
ANSI      American National Standards Institute
ANX       Automotive Network Exchange [Chrysler/Ford/
          General Motors]
AO        Analog Output
AOCE      Apple Open Collaboration Environment
AO/DI     Always On/Dynamic ISDN
AOE       Application Operating Environment [AT&T]
AOL       America Online
AOS       Add Or Subtract
AP        Adjunct Processor + Application Processor
A/P       Accounts Payable
APA       Adaptive Packet Assembly +
          All Points Addressable +
          Arithmetic Processing Accelerator
APAR      Authorized Program Analysis Report [IBM]
APAREN    Address Parity Enable [IBM]
APCUG     Association of PC User Groups
APDU      Application Protocol Data Units
API       Application Program Interface
APIC      Advanced Programmable Interrupt Controller (bus) [Intel]
APIPA	  Automatic Private Interenet Protocol Addressing
APIS      Advanced Passenger Information System
APL     * A Programming Language (Mathematics)
APM       Advanced Power Management [IBM]
APNIC     Asia-Pacific Network Information Center [Internet]
APOP      Authenticated Post Office Protocol
.APP      Application (file name extension) [R:Base]
APPC      Advanced Program-to-Program Communications [IBM]
APPI      Advanced Peer-to-Peer Internetworking
APPLETS   Applications
APPN      Advanced Peer-to-Peer Networking [IBM]
APPS      Applications
APR	  Annual Percentage Rate
APRP      Adaptive Pattern Recognition Processing
APS       Active Pixel Sensor + Advanced Photo System + 
          Advanced Printing Service [IBM] +
          Asynchronous Protocol Specification
APSE      ADA Programming Support Environment
APT       Address Pass Through +
          Advanced Parallel Technology +
          Automatically Programmed Tools
A/R       Accounts Receivable
ARA       AppleTalk Remote Access
ARAG      Antireflective-Antiglare
ARAS      Antireflective-Antistatic
.ARC      Archive (file name extension)
ARCA      Advanced RISC Computing Architecture
ARCnet    Attached Resource Computer Network
.ARJ      Compressed File (file name extension) [Jung]
ARL       Adjusted Ring Length
ARLL      Advanced Run Length Limited
ARM       Advanced RISC Machine (processor) +
          Annotated Reference Manual +
          Asynchronous Response Mode
ARMA      Association of Records Managers and Administrators
ARP       Address Resolution Protocol [Novell]
ARPANET   Advanced Research Projects Agency Network
ARPL      Adjust Requested Privilege Level
ARS	  Activity Reporting System [Unisys]
ART	  Adaptive Resonance Theory (algorithm)
ARTA      Apple Real Time Architecture
ARTIC     A Real-Time Interface Coprocessor [IBM]
ARTS      Asynchronous Remote Takeover Server
.ARTS     Cultural Groups (Domain Name) [Internet]
ARTT      Asynchronous Remote Takeover Terminal
ARQ       Automatic Repeat Request
ARU       Audio Response Unit
AS        Autonomous System [Internet]
ASAI      Adjunct Switch Application Interface [AT&T]
ASAP      As Soon As Possible +
          Automatic Switching And Processing
AS3AP     ANSI SQL Standard Scalable and Portable
ASB       Advanced System Buffering [Intel]
.ASC      ASCII text (file name extension)
ASCC    * Automatic Sequence Controlled Calculator [IBM]
ASCII     American Standard Code for Information Interchange
ASD	  Application Structure Database [Microsoft] +
	  Automatic Skip Driver [Microsoft]
ASF       Active/Advanced Streaming Format [Microsoft]
ASIC      Application-Specific Integrated Circuit
ASIT      Advanced Security and Identification Technology
ASL       Adaptive Speed Levelling
ASLM      Apple Shared Library Manager [Macintosh]
.ASM      Assembler Source Language (file name extension)
ASMP      Asymmetric Multprocessing
ASN       Abstract Syntax Notation + Autonomous System Number
ASO       Automated Systems Operations
ASP       Active Server Page [Microsoft] +
          Application/Authorized Service Provider +
	  Aspect Oriented Programming +
          Association of Shareware Professionals
.ASP      Active Server Page (file name extension)
ASPI      Advanced SCSI Programming Interface [Adaptec]
ASPS      Advanced Signal Processing System
ASR       Address Space Register + Automatic Send-Receive +
          Automatic Speech Recognition +
	  Automatic System Recovery
AST       AST Research, Inc. (named from first initials of
          the founders: Albert Wong, Safi Qureshey, Thomas Yuen)
AS/U      Advanced Server for Unix
ASYNC     Asynchronous
AS/400    Application System/400 [IBM]
AT        Advanced Technology + Attention
ATA	  Advanced Technology Attachment
ATAPI     Advanced Technology Attachment Packet Interface
ATC	  Advanced Transfer Cache
ATDP      Attention Dial Pulse
ATDT      Attention Dial Tone
ATE       Automated Test Equipment
ATG       Advanced Technology Group
ATH       Attention Hang-Up (Modem command)
ATL       Active Template Library
ATM       Adobe Typeface Manager + Air Traffic Management +
          Asynchronous Transfer Mode + Automated Teller Machine
ATPS      AppleTalk Printing Services [Macintosh]
ATR       Automatic Terminal Recognition
ATS       Administrative Terminal System +
          Apple Terminal Services
AT&T      American Telephone and Telegraph
ATTN      Attention
ATTRIB    Attribute (also ATR)
ATX       Advanced Technology Extended [Intel]
ATZ       Attention Restore configuration profile from
          nonvolatile RAM (Modem command)
.AU       Audio (file name extension)
AUDIT     Automated Data Input Terminal
AUI       Attachment/Autonomous Unit Interface
AUP       Acceptable Use Policy [Internet]
AUTO      Automatic
AUTOEXEC  Automatic Execution
AUX       Auxiliary + (First Serial Port)
AV        Audio/Video + Audio/Visual + Authenticity Verification
AVA       Audio Visual Authoring [IBM]
AVC       Audio Visual Connection [IBM]
AVD       Alternating Voice and Data
AVG       Average
AVI       Audio Video Interleave [Microsoft]
AVL	  AVL Tree (named after its founders:
	  Adelson, Veiskii and Landis
AVP       Attribute-Value Pair
AVR       Automatic Voice Recognition
AVT       Applied Voice Technology
AVVID	  Architecture for Voice Video & Integrated Data [Cisco]
AWE       Advanced Wave Effects [Creative Lab]
AWG       American Wire Gage
AWK       (Unix language named after its authors...
          Al Aho, Peter Weinberger and Brian Kernighan)
AWS       Advanced Workstations and Systems (group) [IBM]
AWT       Abstract Window Toolkit [Java]
AX        Architecture Extended + Automatic Transmission

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BA	  Bell Atlantic (company)
BACP      Bandwidth Allocation Control Protocol
BAK       Binary Adaptation Kit [Microsoft]
.BAK      Backup (file name extension)
BAL       Basic Assembly Language
BALUN     Balanced Unbalanced (device)
BAM       Boyan Action Module
BAPI      Business Application Programming Interface [SAP]
BARTS     Bell Atlantic Regional Timesharing
.BAS      Basic Language (file name extension)
BASH      Bourne Again Shell [Unix]
BASIC     Beginner's All-purpose Symbolic Instruction Code
BASM      Built-In Assembler
BAT       Block Address Translation
.BAT      Batch Processing (file name extension)
B2B	  Business-To-Business
BBS       Bulletin Board System
B2C	  Business To Consumer
BCC       Block Check Character
BCC:      Blind Carbon Copy
BCD       Binary Coded Decimal
B-CHANNEL Bearer Channel
BCL       Base Class Libraries + Batch Command Language
BCN       Beacon
BCNF	  Boyce-Codd Normal Form
BCP       Best Current Practice + Bulk Copy Program
BCPL      Basic Computer Programming Language
BCR       Byte Count Register
BCS       Bar Code Sorter
BDA       Bios Data Area
BDC       Backup Domain Controller
BDE       Borland Database Engine [Borland]
BDLS      Bidirectional Loop Switching
BDOS      Basic Disk Operating System
BDR       Bus Device Request
BDSL      (See DSL)
BE        Below or Equal
B2E       Business To Employees
BECN      Backward Explicit Congestion Notification
BEDO      Burst Extended Data Out
BEEP	  Blocks Extensible Exchange Protocol
BEL       Bell
BELLCORE  Bell Communications Research
BER       Basic Encoding Rules + Bit Error Rate
BERT      Bit Error Rate Test/Tester
BF        Bad Flag
B/F       Background/Foreground
.BFC      Briefcase (file name extension) [Microsoft]
BFF       Binary File Format [IBM]
BFT       Binary File Transfer
BFTP      Batch FTP
BGA       Ball Grid Array
BGCOLOR   Background Color [HTML]
BGE       Branch if Greater or Equal
.BGI      Borland Graphic Interface (file name extension)
BGP       Border Gateway Protocol
BGT       Branch if Greater Than
BHI       Branch if Higher
BHIS      Branch if Higher or Same
BHO	  Browser Helper Object [Spybot]
BI        Binary Input
.BIB      Bibliography (file name extension)
BiDi      Bi-Directional
BIFET     Bipolar Field Effect Transistor
BIFF      Binary Interchange File Format
BIM       Beginning of Information Marker
.BIN      Binary (file name extension)
BINAC   * Binary Automatic Computer
BIND      Berkeley Internet Name Domain
BINHEX    Binary Hexadecimal
BIOS      Basic Input/Output System
BIS       Business Information System
BISDN     Broadband Integrated Services Digital Network
BIST      Built-In Self-Test
BiSYNC    (See BSYNC)
BIT       Binary Digit
BITNET    Because It's Time Network
BITNIC    Bitnet Network Information Center
BIU       Bus Interface Unit
BIW       Business Intelligence Warehouse [SAP]
BIX       Byte Information Exchange (BBS)
.BIZ      Businesses (Domain Name) [Internet]
.BK!      Backup (file name extension) [WordPerfect]
.B~K      Backup (file name extension)
BKSP      Backspace
BL        Backlit + Bit Line
BLAST	  Bell Labs Layered Space Time +
          Blocked Asynchronous Transmission (protocol)
          [Communications Research Group]
.BLD      BASIC Bload Graphics (file name extension)
BLE       Branch if Less or Equal
BLER      Block Error
BLK       Block
BLMC      Buried Logic Macrocell
BLOB      Binary Large Object
BLOG	  Web Log
BLOS      Branch if Lower Or Same
BMI       Branch if Minus
BMIC      BusMaster Interface Controller [Intel]
BMP       Basic Mapping Support + Basic Multilingual Plane +
          Batch Message Processing Program
.BMP      Bitmap (file name extension) [Paintbrush Format]
BNC       Bayonet Neill-Concelman (connector used with
          coaxial cable invented by Mr. Neill-Concelman) +
	  British Naval Connector
BNE       Branch if Not Equal
BNF       Backus-Naur Form (also Backus-Normal Form) [developed by
          John Backus and Peter Naur]
BNS       Backbone Network Service
BO        Binary Output
BOA 	  Basic Object Adapter
BOB       Break-out Box
BOC       Basic Operator Console
BOF       Beginning Of File
BOM       Basic Online Memory [IBM] + Beginning Of Message
BOND      Bandwidth On Demand
BOOTP     Bootstrap Protocol [Internet]
BOPS      Billion Operations Per Second
BORPQU    Borland Pro Quattro
BORQU     Borland Quattro
BOS       Basic Operating System
BOT       Beginning Of Table + Beginning of Tape + Robot
BP        Base Pointer
BPB       BIOS Parameter Block
BPDU      Bridge Protocol Data Unit
	  Berkeley Packet Filter
BPI       Bits Per Inch
BPL       Branch If Plus + Broadband Over Power Lines
BPP       Bits Per Pixel
BPR	  Business Process Re-engineering [Linux]
BPS       Bits Per Second + Bytes Per Second
BPSK      Binary Phase Shift Keying
BR        Bad Register
BRGC      Binary Reflected Gray Code
BRI       Basic Rate Interface + Brain Response Interface
BS        Backspace
BSAM      Basic Sequential Access Method
BSC       Base Station Controller + Binary Synchronous Communication
.BSC      Boyan Script (file name extension) [Boyan Communications]
BSCS      Bachelor of Science (Degree) in Computer Science
BSD       Berkely Software/Standard Distribution
BSF       Bit Scan Forward
BSI       British Standards Institute
BSM       Basic Storage Module [IBM]
BSP       Bulk Synchronous Parallelism
BSR       Bit Scan Reverse
BS-RAM    Burst Static RAM
BSS       Block Started by Symbol
BST	  Binary Search Tree
BSY       Busy
BSYNC     Binary Synchronous Communications (protocol)
BT        Bit Test
BTAM      Basic Telecommunications Access Method [IBM]
BTB       Branch Target Buffer
BTC       Bit Test and Complement
BTI	  Business Type Identifier
BTOA      Binary To ASCII
BTP       Batch Transfer Program
BTR       Bit Test and Reset
BTS       Base Transceiver Station + Bit Test and Set
BU        Branch Unit
BUBL      Bulletin Board for Libraries [Janet]
BUF       Buffer
BUS       Broadcast and Unknown Server
BVH       Base Video Handler
BWM       Block-Write Mode
B2X       Binary To Hexadecimal [REXX]
BYTE      Binary Element String

C...

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C         C Programming Language
.C        C source code (file name extension) [C]
CA        Certification Authority + Collision Avoidance
CAB	  Compressed Application Binary [Microsoft]
.CAB      Cabinet (file name extension) [Microsoft]
CACLS	  Command-Line Access Control Lists [Microsoft]
CAD       Computer Aided Design
CADD      Computer Aided Design and Drafting
CADE      Client/server Application Development Environment
CAE       Client Application Enabler + Common Applications
          Environment + Computer Aided Engineering
CAEN      Chemically Assembled Electronic Nanocomputer
CAEX      Computer Aided Exploration
CAG       Column Address Generator
CAI       Computer Aided Instruction
CAIRN     Collaborative Advanced Interagency Research Network
CAL       Calendar + Client Access License +
          Computer Aided Learning
CALS      Computer-Aided Acquisition in Logistic Support
CAM       Common Access Method + Computer Aided Manufacturing +
          Contents Addressable Memory
CAN       Cancel + Controller Area Network
CANBUS    Conroller Area Network Bus
CAP       Carrierless Amplitude and Phase-Modulation +
          Central Arbitration Point +
          Communication Application Platform +
          Competitive Access Provider +
          Computer Aided Publishing
.CAP      Capture (file name extension)
CAPD      Computing To Assist Persons With Disabilities [Johns
          Hopkins University]
CAPE      Concurrent Art-to-Product Environment
CAPS      Capitals (Upper Case Letters) +
          Cassette Programming System
CAPTCHA	  Completely Automatic Public Turing Test To Tell 
	  Computers and Humans Apart
CAR	  Committed Access Rate [Cisco]
CARL      Colorado Alliance of Research Libraries [Internet]
CART	  Computer-Assisted Radar Tomography
CAS       Column Address Select/Strobe +
          Communications Application Specification +
          Computer Aided Styling
CASE      Computer Aided Software Engineering
CASL      Crosstalk Application Scripting Language [DCA]
CASS      Computer Assisted Search Service
CASSIS    Classified and Search Support Information System
CAT       Computer Adaptive Test + Computer Aided Testing +
          Computer Aided Tomography +
          Computer Aided Transcription + Concatenate
.CAT      Catalog (file name extension)
CATS      Computer Assisted Training System
CAT5E	  (Cat 5e) Category 5e (cables)
CAT SCAN  Computerized Axial Tomography Scan
CATV      Community Antenna Television (this was the original
          name for what is now known as Cable TV)
CAU       Controlled Access Unit
CAV       Constant Angular Velocity
CAVE      Computer Automatic Virtual Environment
CBC       Cipher Block Chaining
CBCR      Channel Byte Count Register
CBDS      Connectionless Broadband Data Service
CBEMA     Computer and Business Equipment
          Manufacturers Association
CBGA      Ceramic Ball Grid Array
CBI       Computer Based Instruction\Instrumentation
CBL       Computer Based Learning
.CBL      COBOL source code (file name extension)
CBMS      Computer-Based Mail System
CBN	  Community Based Networks
CBR       Case Based Reasoning + Constant Bit Rate
CBT       Computer Based Training
CBW       Convert Byte to Word
CBX       Computer-Controlled Branch Exchange
CC        Cluster Controller
CC:       Carbon Copy
CCD       Charged-Coupled Device
CCFT      Cold Cathode Fluorescent Tube
CCI       Common Client Interface + Copy Control Information
CCIE      Cisco Certified Internetwork Expert [Cisco]
CCITT     Comite Consultatif International Telegraphique et
          Telephonique/ Consultative Committee for International
          Telegraph and Telephone
CCL       Connection/Cursor Control Language
CCM       Corba Component Mode
CCNA	  Cisco Certified Network Associate
CCNP	  Cisco Certified Network Professional
CCP       Certified Computing Professional +
          Console Command Processor
CC/PP	  Composite Capabilities/Preference Profile
CCS       Common Command Set + Common Communications Services +
          Common Communications Support +
          Continuous Composite Servo + Cryptographic Checksum
.CCS      Color Calibration System (file name extension)
CCSIS	  Coded Character Set ID
CCSD      Cellular Circuit-Switched Data
CCTLD	  Country Code Top-Level Domain
CD        Carrier Detect + Change Directory +
          Collision Detection + Color Display + Compact Disk
C/D       Control Data
C2D       Character To Decimal [REXX]
CDA       Compound Document Architecture [DEC]
.CDA      CD Audio-Track (file name extension)
CDBT      Compact Disk-Based Training
CDC       Connected Device Configuration +
          Control Data Corporation
CD_CHRDY  Card Channel Ready [IBM]
CD-DA     Compact Disk - Digital Audio
CDDI      Copper Distributed Data Interface
CDE       Common Desktop Environment + Complex Data Entry
CD-E      Compact Disk - Erasable
CDF       Channel Definition Format
.CDF      Comma Delimited Format (file name extension)
CDFS      Compact Disc File System [Microsoft]
CD+G      Compact Disk plus Graphics
CD-I      Compact Disk - Interactive
CDIA      Certified Document Imaging Architect
CDL       Computer Design Language
CDMA      Code Division Multiple Access
CDMF      Commercial Data Masking Facility [IBM]
CD-MO     Compact Disk - Magneto Optical
CDO	  Collaboration Data Objects [Microsoft]
CDOS      Concurrent Disk Operating System
CDP     * Certificate In Data Processing (First certification
          for Computer Professionals)
CDPD      Cellular Digital Packet Data
CDR       Call Detail Record + Call Detail Recording +
          Common Data Representation
.CDR	  CorelDRAW (file name extension) [Corel]
CD-R      Compact Disk - Recordable
CD-RAM    Cached RAM
CD-RDx    Compact Disk - Read Only Memory Data Exchange Standard
CDRL      Contract Data Requirements List
CD-ROM    Compact Disk - Read Only Memory
CD-ROM-XA CD-ROM Extended Architecture
CD-RTOS   Compact Disk - Real Time Operating System
CD-RW     Compact Disk - Rewritable
CDS       Current Directory Structure
CDSA      Common Data Security Architecture
CDSL      (See DSL)
.CDT      Corel Draw Template (file name extension)
CD-V      Compact Disk - Video
CD-WO     Compact Disk - Write Once
.CDX      Compound Index (file name extension) [Fox Pro]
CD-XA     Compact Disk - Extended Architecture
CE        Cache Enable + Chip Enable + Collision Elimination +
          Consumer Elecronics + Convert Enable
CEB	  Conditional End Bracket
CEC	  Certified E-Commerce Consultant
CEG       Continuous Edge Graphics
CEI       Conducted Electromagnetic Interference
CELP      Card Edge Low Profile (socket) [Intel]
CEMS      Constituent Electronic Mail System
CEOP      Conditional End Of Page
CER       Canonical Encoding Rules
CERN      The European Particle Physics Laboratory (initials
          originally from Conseil Europien pour la Recherche
          Nucliaire)
CERT      Computer Emergency Response Team
CFB       Cipher Feedback + Configurable Function Block
.CFG      Configuration (file name extension)
CFM       Code Fragment Manager [Macintosh] +
          Cubic Feet Per Minute
CFML      ColdFusion Markup Language
CFP	  Call For Proposal
CFR       Computerized Facial Recognition
CFS       Caching/Common File System
CFV       Call For Votes [Bitnet]
CG        Control Gate
CGA       Color Graphics Adapter
CGE       Common Graphics Environment
CGI       Computer Generated Images + Computer Graphics Interface
CGI-BIN   Common Gateway Interface - Binary
.CGM      Computer Graphics Metafile (file name extension) +
          Graph (file name extension) [Lotus 1-2-3] [LDC]
CGMS	  Copy Generation Management System
CGS       Continuous-Grain Silicon
CHAP      Challenge-Handshake Authentication Protocol
CHAR      Character
CHAT      Conversational Hypertext Access Technology [Internet]
CHCK      Channel Check
CHCP      Change Code Page
CHDIR     Change Directory
CHFN      Change Finger [Unix]
CHGRP     Change Group
CHIPS     Clearinghouse Interbank Payments System
.CHK      CHKDSK (file name extension)
CHKDSK    Check Disk
CHMOD     Change Mode
CHOWN     Change Owner
CHP       Chapter
CHR       Character
CHRP      Common Hardware Reference Platform
CHS       Cylinder Head Sector
CHTML     Compressed HTML
CI        Component Interface
CIA       Current Instruction Address
CIAC      Computer Incident Advisory Capability
CICS/VS   Customer Information Control System/
          Virtual Storage [IBM]
CID       Charge-Injection Device +
          Configuration/Installation/Distribution
CIDR      Classless Inter-Domain Routing
CIF       Common Interchange/Intermediate Format +
          Crystallographic Information File +
          Customer Information Feed
CIFS      Common Internet File System
CIL	  Common Intermediate Language [ECMA]
CIM       Common Information Model +
          CompuServe Information Manager +
          Computer Integrated Manufacturing
CIO       Chief Information Officer
CIOCS     Communication Input/Output Control System
CIP       Command Interface Port + Common Indexing Protocol
CIR       Committed Information Rate
CIRC      Circular Reference +
          Cross-Interleaved Reed-Solomon Code
CIS       Card Information Structure + Client Information System +
          CompuServe Information Service +
          Computer Information Systems + Contact Image Sensor +
          Customer Information System
CISC      Complex Instruction Set Computing
CIT       Computer-Integrated Telephony
CIVR      Computer and Interactive Voice Response
CIW	  Certified Internet Webmaster
CIX       Commercial Internet Exchange +
          Compulink Information Exchange
CJLI      Command Job Language Interpreter
CKD       Count Key Data (device)
CLAR      Channel Local Address Register
CLASS     Client Access to Systems and Services +
          Cooperative Library Agency for Systems and Services +
          Custom Local-Area Signaling Services
CLC       Clear Carry Flag
CLD       Clear Direction Flag
CLDC	  Connected Limited Device Configuration
CLEC      Competitive Local Exchange Carrier
CLI       Call-Level Interface + Clear Interrupt Flag +
          Client Library Interface + Command Line Interface +
	  Common Language Infrastructure/Interface
CLIB      C Library
CLID      Calling Line Identification
CLIST     Command List
CLK       Clock
CLNP      Connectionless Network Protocol
CLOS      Common Lisp Object System
CLP       Cell Loss Priority + Constraint Logic Programming
.CLP      Clipboard (file name extension) [Microsoft]
CLR	  Common Language Runtime [Microsoft]
CLS       Clear Screen + Common Language Support
CLSID     Class Identifier
CLTP      Connectionless Transport Protocol
CLTS      Clear Task Switch Flag
CLTV      Constant Linear Time Velocity
CLUI      Command Line User Interface
CLUT      Color Look-Up Table
CLV       Constant Linear Velocity
CM        Centimeter + Control Mark + Corrective Maintenance
CMA       Concert Multi-thread Architecture
CMAK	  Connection Manager Administration Kit [Microsoft]
CMC       Common Mail Calls + Common Messaging Calls +
          Communication Management Configuration +
          Complement Carry Flag +
          Computer-Mediated Communication [Internet]
CMD       Circuit Mode Data
.CMD      Command (file name extension)
CMF       Creative Music Format
CNIDR     Clearinghouse for Network Information and
          Discovery and Retrieval [Internet]
CMIP      Common Management Information Protocol
CMIS      Common Management Information Services/System
CML       Chemical Markup Language + Conceptual Modelling Language +
          Computer Managed Learning + Current Mode Logic
CMM       Capability Maturity Model
CMMS      Computerized Maintenance Management Software
CMMU      Cache/Memory Management Unit [Motorola]
CMOS	  Coats-Mellon Operational Specification +
          Complementary Metal-Oxide Semiconductor
CMOV      Conditional Move
CMP       Compare + Computer
CMPS      Compare Word String
CMS       Call Management Server + Code Management System +
          Compiler Monitor System + Conversation Monitor System
CMTS	  Cable Modem Termination System
CMVC      Configuration Management Version Control [IBM]
CMW       Compartmented Mode Workstation
CMY       Cyan-Magenta-Yellow (color model)
CMYK      Cyan-Magenta-Yellow-Black (color model)
CNA       Certified NetWare/Network Administrator
CNAPS     Co-Processing Node Architecture for Parallel Systems
CNC       Computerized Numerical Control
CNE       Certified NetWare Engineer
.CNF      Configuration (file name extension)
CNG       Calling (tone)
CNI       Certified Novell Instructor [Novell]
CNIDR     Clearinghouse for Networked Information and
	  Discovery and Retrieval [Internet]
CNN       Composite Network Node
CNR       Carrier to Noise Ratio + Communication Network Riser
CNSS      Core Nodal Switching Subsystem [Internet]
CNT	  Carbon Nanotube
.CNT      Contents (file name extension)
CNV       Conventional (pertaining to Memory)
CNVT      Convert
CNX       Certified Network Expert
CO        Central Office + Command Output + Convert Out
COAST     Card On A Stick (module)
COAX      Coaxial Cable
COB       Chip-On-Board
.COB      COBOL source code (file name extension)
COBOL     Common Business-oriented Language (See HLL)
.COD      Code List (file name extension)
CODASYL * Conference on Data System Languages (Group that
          designed COBOL)
CODE      Client-Server Open Development Environment
CODEC     Coder/Decoder + Compression/Decompression
COE	  Common Operating Environment
COEM      Commercial Original Equipment Manufacturer
COFF      Common Object File Format [Unix]
COGO      Coordinate Geometry (Programming Language)
COL       Collision + Computer Oriented Language
COLD      Computer Output to Laser Disk
COLL      Collision
COM       Component Object Model [Microsoft] +
          Computer Output Microfilm
.COM      Command (file name extension) +
          Commercial Business (Domain Name) [Internet]
COM1      First serial Port (asynchronous port)
COM2      Second serial Port
COM3      Third serial Port
COM4      Fourth serial Port
COMDEX    Computer Dealers Exposition
COMET     Cornell Macintosh Terminal Emulator
COMM      Communications
COMMAT	  In Morse Code (.--.-.)(dot dash dash dot dash dot),
	  name of the sign to denote the Commercial At symbol "@".
	  (Adopted by the ITU in December 2003)
COMP      Compare
COMP.     Computers [USENET Newsgroup Category]
COMSAT    Communications Satellite Corporation
CON       Console (includes Keyboard and Screen)
COND      Condition
CONFIG    Configuration
CONS      Connection-Oriented Network Service
CONTONE   Continuous Tone
.COOP	  Cooperatives-Business (Domain Name) [Internet]
COPICS    Communications Oriented Production Information
          and Control System [IBM]
COR       Common Object Runtime
CORBA     Common Object Request Broker Architecture
COREN     Corporation for Research and Enterprise Network
COS       Compatible Operating System +
	  Customer Order Specification [Kodak/Fuji]
COSE      Combined Office Standard Environment +
          Common Open Software/Systems Environment
COSMIC    Computer Software Management and Information
          Center [NASA]
COSMOS    Computer System for Mainframe Operations
COSS      Common Object Services Specification
COTS      Commercial Off-The-Shelf (software)
CP        Copy Protected
CPA       Certified Public Accountant + Cost Per Action
CPAN	  Comprehensive Perl Archive Network
CPC       Constant Point Calculation + Cost Per Click
CPCS      Check Processing Control System [IBM]
CPE       Central Processing Element +
          Customer Premises Equipment +
          Customer Provided Equipment
.CPE      Cover Page (file name extension)
CPFR	  Collaborative Planning, Forecasting and Replenishment
CPG       Clock Pulse Generator
CPI       Characters Per Inch + Clock Per Instruction +
          Common Programming Interface [IBM]
.CPI      Code Page Information (file name extension) [MS-DOS]
CPI-C     Common Programming Interface for Communications [IBM]
CPIO      Copy In and Out [Unix]
CPL       Current Privilege Level
.CPL      Control Panel (file name extension)
CPLD      Complex Programmable Logic Device
CPM       Critical Path Method
CP/M      Control Program for Microcomputers [Digital Research]
CPO	  Chief Privacy Officer
CPRM	  Content Protection for Recordable Media
CPS	  Certification Practice Statement +
          Characters Per Second + Cycles Per Second
CPT       Command Pass Through
CPU       Central Processing Unit
CPW       Commercial Processing Workload [IBM]
CR        Carriage Return
CRAM	  Challenge-Response Authentication Mechanism +
          Cyberspatial Reality Advancement Movement
CRAYON    Create Your Own Newspaper
CRC       Cyclic Redundancy Check
.CRD      Cardfile (file name extension) +
          Chord (music file name extension)
CREN      Computer Research Education Network +
          Corporation for Research and Education Networking
CRF       Cable Retransmission Facility + Cross Reference File
CRI       Color Reproduction Indices
CRL	  Certificate Revocation List
CR/LF     Carriage Return/Line Feed
CRM       Customer Relationship Management
CROM      Control Read Only Memory
CRT       Cathode Ray Tube
CRTC      CRT Controller
CRUD      Create, Retrieve, Update, Delete
CS        Chip Select + Clear to Send + Code Segment
C/S       Client/Server
CSA       Calendaring and Scheduling API [IBM]
CSAR      Channel System Address Register
CSCW      Computer Supported Cooperative Work
CSD       Circuit-Switched Data +
          Computer Services Department +
          Corrective Service Diskette [IBM]
CSDS      Circuit Switched Data Service
CSE       Certified System Engineer
CSFI      Communication Subsystem For Interconnection
CSG       Constructive Solid Geometry +
          Consulting Services Group [Lotus]
CSI	  Code Sequence Identification +
          Command Sequence Introducer + 
	  CompuServe Incorporated
CSID      Call Subscriber Identification
CSL       Computer Sensitive Language
CSLIP     Compressed Serial Line Interface Protocol [Internet]
CSM       Code Set Map (file) + Communications Services Manager +
          Control Strip Module [Macintosh]
CSMA/CA   Carrier Sense Multiple Access/with Collision Avoidance
CSMA/CD   Carrier Sense Multiple Access/with Collision Detection
CSMS      Customer Support Management System
CSN       Card-Select Number
CSNET     Computer Science Network
CSO       Central Services Organization
CSP       Certified Systems Professional +
          Chip-Scale Packaging +
          Commercial Service Provider +        
	  Commercial Subroutine Package +
          CompuCom Speed Protocol [CompuCom] +
          Communicating Sequential Processes +
          Cross System Product [IBM]
CSPDN     Circuit Switched Public Data Network
CSRAM     Custom Static RAM
CSS     * Continuous System Simulator (Language)
CSS       Cascading Style Sheet [Microsoft] +
          Contact Start-Stop + Content Scrambling System
CSSM      Client-Server Systems Management [IBM]
CS/SS     Card Service/Socket Service
CSTA      Computer-Supported Telephony Applications
CSU       Channel Service/Switching Unit
CSV       Circuit-Switched Voice +
          Comma-Separated Value/Variable +
          Common Services Verbs (interface) [Microsoft]
C2T	  Cable Changing Technology
C&T       Chips and Technologies
CTB       Cipher Type Byte
CTC       Channel To Channel + Counter/Timer Chip
CTCP      Client-To-Client Protocol
CTI       Computer-Telephony Integration
CTL	  Complex Text Layout
CTOS	  Cassette Tape Operating System +
          Computerized Tomography Operating System +
          Convergent Technologies Operating System
CTPA      Coax-to-Twisted-Pair Adapter
CTRCO   * Calculating,Tabulating,Recording Company (The name of
          this company was changed to "International Business
          Machines" by Thomas J. Watson, Sr.)
CTRL      Control
CTS       Clear To Send + Computer Telephony Solution [IBM] +
          Customer Telephone System
CTSS    * Compatible Time Sharing System
CUA       Common User Access [IBM]
CUB       Cursor Backward
CUD       Cursor Down
CUE       Custom Updates and Extras (card) [Egghead Software]
CUF       Cursor Forward
CUI       Character-Oriented User Interface +
          Common User Interface [IBM]
CUP       Cursor Position
CUPID     Completely Universal Processor I/O Design [AST]
.CUR      Cursor (file name extension)
CUSIP     Committee for Uniform Security Identification
          Procedures [U.S. Treasury]
CUT       Control Unit Terminal
CUTE      Clarkston University Terminal Emulator
CUU       Cursor Up
CVE	  Common Vulnerabilities and Exposures [US-CERT]
CVF       Compressed Volume File
CVGA      Color Video Graphics Array
CVIA      Computer Virus Industry Association
CVS	  Computer Vision Syndrome + Concurrent Versions System
CVT       Convert
CVW       CodeView for Windows
CWA	  Competitive Web Analysis
CWD       Convert Word to Double Word +
          Change Working Directory [Internet]
CWIS      Campus Wide Information Service/System [Internet] +
          Community Wide Information Service/System [Internet]
C2X       Character To Hexadecimal [REXX]
CXML	  Commerce Extensible Markup Language
CYL       Cylinder
CYMK      Cyan-Yellow-Magenta-Black (color model)

D...

| TOP | UP to C | DN to E | BOTTOM |

D/A       Digital to Analog
DAA       Data Access Arrangement +
          Decimal Adjust for Addition
DAB       Digital Audio Broadcasting
DAC       Data Acquisition and Control + Device Access Code +
          Digital to Analog Converter +
          Dual Attachment Concentrator
DACL      Discretionary Access Control List
DACTLU	  Deactive Logical Unit
DAD       Desktop Application Director [Borland]
DAE       Digital Audio Extraction
DAF	  Destination Address Field
DAI       Distributed Artificial Intelligence
DAL       Data Access Language [Apple Computer] +
          Data Access Layer + Disk Access Lockout
DAM       Data Acquisition and Monitoring
DAMA	  Demand Assigned Multiple Access
DAMPS     Digital AMPS
DAO       Data Access Object [Microsoft] + Disk At Once
DAP       Data Access Protocol [DEC] +
          Developer Assistance Program
	  Dynamic Application Partitioning [IBM]
DAPIE     Developers Application Programming Interface Extensions
DARI      Database Application Remote Interface [IBM]
DARMS     Digital Alternate Realization of Musical Symbols
DART      Digital Audio Reconstruction Technology
DAS       Decimal Adjust for Subtraction +
          Dual-Attached Station
DASD      Direct Access Storage Device [IBM]
DAT       Digital Audio Tape + Disk Array Technology
.DAT      Data (file name extension)
DATACOM   Data Communications
DAV       Digital Audio-Video +
	  Distributed Authoring and Versioning
DAVIC     Digital Audio-Visual Council
dB        Decibel
DB        Data Base + Data Buffer + Device Bay
dBA       Adjusted Decibel
.dba	  Date Book Archive (file name extension) [Palm]
DBC       Device Bay Controller
DBCS      Delivery Bar Code Sorter + Double-Byte Character Set
.DBF      Database Format (file name extension)
DBIS      Dun & Bradstreet Information Services
.DBK	  Docbook (format) (file name extension)
dBm	  Decibels to a Milliwatt
DBM       Data Base Manager
DBMS      Data Base Management System
DBR       DOS Boot Record
DBS       Data Base Server +
          Direct (to home) Broadcast (satellite) System
DBV       Digital Broadcast Video
DBWR	  Database Writer [Oracle]
DB2       Database 2
DC        Data Collection + Data Communication + Data Control +
          Device Control + Direct Current
D2C       Decimal To Character [REXX]
DCA       Digital Communications Associates +
          Document Content Architecture [IBM]
DCAF      Distributed Console Access Facility [IBM]
DCAM      Digital Camera + Direct Chip Attach Module
DCB       Device Control Block + Disk Coprocessor Board [Novell]
DCC       Data Country Code + Digital Command Control +
          Digital Compact Cassette + Direct Cable/Client Connection
          + Display Combination Code
DCD       Data Carrier Detect
DCE       Data Circuit-Terminating Equipment +
          Data Communications Equipment +
          Distributed Computing Environment [OSF] +
          Distributed Computing Equipment
DCED      Distributed Computing Environment Daemon
DCF       Data Communication Facility [IBM] +
          Data Compression Facility +
          Data Count Field [IBM] +
	  Design Rule for Camera File Systems +	
          Driver Configuration File [Lotus]
D-CHANNEL Data Channel
DCI       Digital Camera Images + Display Control Interface
DCL       Data Control Language + Declaration +
          DEC Command Language [DEC] +
          Device Clear + Digital Control Logic +
          Digital Command Language [Digital]
DCML	  Dynamic Configuration Markup Language
DCOM      Distributed Component Object Model
DCP	  Device Control Protocol +
          Digital Light Processing [TI]
DCS       Data Collection System + Data Control System +
          Desktop Color Separation + Distributed Control System
DCT       Discrete Cosine Transform
.DCT      Dictionary (file name extension)
DCU       Data-Cache Unit
DD        Day + Digital Display + Double Density
DDA       Distributed Data Access + Domain-Defined Attribute
DDB       Device Dependent Bitmap + Device Descriptor Block
DDC       Digital Data Channel [VESA] + Display Data Channel
DDCMP     Digital Data Communications Message Protocol [DEC]
DDC1      Display Data Channel One
DDCS      Distributed Database Connection Services [IBM]
DDD       Direct Distance Dialing
DDE       Direct Data Entry + Dynamic Data Exchange [Microsoft]
DDEML     Dynamic Data Exchange Manager Library [Microsoft]
DDF       Display Data Channel + Dynamic Data Formatting [IBM]
DDI       Device Driver Interface +
          Digital Document Interchange + Direct Dial In
DDK       Device Driver Kit [Microsoft Windows]
DDL       Data Definition Language + Data Description Language
DDM       Distributed Data Management
DDN       Defense Data Network
DDNS      Dynamic Domain Naming System
DDOS	  Distributed Denial Of Service
DDP       Datagram Delivery Protocol +
          Distributed Data Processing
DDR       Dynamic Document Review [Symantec]
DDR-SDRAM Double Data Rate-SDRAM
DDS       Data Description Specification +
          Digital Dataphone Service [AT&T] + Design Data Sheet +
          Digital Data Storage + Distributed Database Services
DDX       Digital Data Exchange
DE        Device End
DEA       Data Encryption Algorithm + Disposable Email Address
DEC       Decrement + Device Clear + Digital Equipment Corporation
DECNET    Digital Equipment Corporation Networking (protocol)
DEF       Desktop Functional Equivalent [Compaq]
.DEF      Definitions + Defaults (file name extensions)
DEFRAG    Defragment
DEK       Data Encryption Key
DEL       Delete
DELSTR    Delete String [REXX]
.DEM      Demonstration (file name extension)
DEN	  Directory Enabled Network +
          Document Enabled Networking [Novell-Xerox]
DEP	  Data Execution Protection [Microsoft]
DER       Distinguished Encoding Rules
DES       Data Encryption Standard + Data Entry Sheet
.DES      Description (file name extension)
DET       Device Execute Trigger
DEV       Device
DF        Data Field + Default + Destination Field +
          Device Flag + Double Flag
DFC       Data Flow Control
DFD	  Data Flow Diagram
DFDR      Digital Flight Data Recorder
DFM       Design For Manufacturability [IBM]
DFP       Digital Flat Panel
DFS       Distributed File System
DFSMS     Data Facility Storage Management Subsystem [IBM]
DFT       Design For Testability + Diagnostic Function Test +
          Discrete Fourier Transform +
          Distributed Function Terminal
DFU       Data File Utility
DGIS      Direct Graphics Interface Standard
DHCP      Dynamic Host Configuration Protocol
DHL       Dynamic Head Loading
.DHP      Dr. Halo PIC (file name extension)
DHTML     Dynamic HTML
DI        Data In + Destination Index
DIA       Document Interchange Architecture [IBM]
DIAD	  Delivery Information Acquisition Device [UPS]
DIB       Device Independent Bitmap +
          Directory Information Base +
          Dual Independent Bus [Intel]
DIBOL     DEC Business Oriented Language
.DIC      Dictionary (file name extension)
DICOM	  Digital Imaging and Communications in Medicine
DID       Direct Inward Dialing
DIDS      Distributed Intrusion Detection System
DIF       Data Interchange Format
DIFFSENS  Differential Sense
DIIP      Direct Interrupt Identification Port
DILA	  Direct-Drive Image Light Amplifier
DIME	  Direct Internet Message Encapsulation
DIMM      Dual In-Line Memory Module
DIN       Deutsche Industrie Norm (German equivalent of EIA)
DIO       Data Input-Output
DIP       Dialup Internet Protocol [Internet] +
          Digital Imaging Processing +
          Dual In-line Package + Dual In-line Pin
DIR       Directory (file)
DIS	  Distributed Interactive Simulation +
          Draft International Standard +
          Dynamic Impedance Stabilization [CompuCom]
DISA      Data Interchange Standards Association +
          Direct Inward System Access
DISP      Displacement (offset)
DIST	  Digital Image Scaling Technology
DIT       Directory Information Tree
DIV       Divide
DIVE      Direct Interface Video Extension [OS/2 Warp]
DIVX      Digital Video Express
DIW       D-Inside Wire [AT&T]
DIX	  Digital-Intel-Xerox (Original Ethernet Standard)
.DIZ      Description In Zip (file name extension)
DL        Download (also D/L)
DL/1      Data Manipulation Language 1 [IBM]
DLB       Dynamic Load Balancing
DLC       Data Link Control (protocol) [IBM] +
          Distributed Loop Carrier
DLCI      Data Link Connection Identifier
DLD       Display List Driver
DLE       Data Link Escape
DLL       Dynamic Link Library
DLM       Distributed Lock Manager + Dynamic Link Module
DLP       Digital Light Processing [TI]
DLPI 	  Data Link Provider Interface
DLR       DOS LAN Requester
DLS       Data Link Switching [IBM]
DLT       Digital Linear Tape
DM        Distributed Memory
DMA       Direct Memory Access/Addressing +
          Document Management Alliance
DMAC      DMA Controller
DMACS     Distributed Manufacturing Automation & Control Software
DMD       Digital Micromirror Device [TI]
DME       Direct Memory Execution +
          Distributed Management Environment
DMF       Distribution Media Format [Microsoft]
DMI       Desktop Management Interface
DML       Data Manipulation Language +
	  Dialog Markup Language [W3C]
DMM       Digital Multimeter
DMMS      Dynamic Memory Management System
DMOS      Double-diffused Metal-Oxide Semiconductor
DMP       Dot Matrix Printer
DMPC      Distributed Memory Parallel Computer
DMPP      Distributed Memory Parallel Processor
DMQS      Display Mode Query and Set [IBM]
DMS       Data Management Software + Data/Document
          Management System
DMSD      Digital Multistandard Decoding
DMSDK	  Digital Media Software Development Kit [SGI]
DMSS      Distributed Mass Storage System
DMT       Digital/Discrete Multi-Tone
DMTF      Desktop Management Task Force
DMY       Day Month Year
DMZ	  Demilitarized Zone
DN        Down
DNA	  Deoxyribonucleic Acid
DNC       Direct Numerical Control
DNIC      Data Network Identification Code
DNIE	  Digital Natural Image Engine
DNIS      Dialed Number Identification Service
DNS       Domain Naming System
DO        Data Out + Distributed Objects
DOA	  Dead On Arrival
.DOC      Document + Documentation (file name extensions)
DOCSIS	  Data Over Cable-Service Interface Specification
DOCSV     Data Over Circuit-Switched Voice
DOE       Distributed Objects Environment/Everywhere
DOIP      Dial Other Internet Providers [IBM]
DO-IT     Disabilities, Opportunities, Internetworking and
          Technology
DOLAP	  Desktop OLAP
DOM       Document Object Model [W3C]
DOMF      Distributed Object Management Facility
DOS       Denial Of Service + Disk Operating System
DOSEM     DOS Emulation
.DOT	  Document Template (file name extension)
DOV       Data Over Voice
DOW       Day Of Week
DP        Data Processing
DPA       Demand Protocol Architecture [3Com] +
          Document Printing Architecture
DPAM      Demand Priority Access Method
DPAREN    Data Parity Enable [IBM]
DPB       Drive Parameter Block
DPC       Direct Program Control
DPI       Distributed Protocol Interface + Dots Per Inch
DPL       Descriptor Privilege Level
DPM       Digital Panel Meter
DPMA      Data Processing Management Association
DPMI      DOS Protected Mode Interface [Microsoft]
DPMS	  Digital Power Management Signaling +
          Display Power Management Support
DPO       Data Phase Optimization
DPOF	  Digital Print Order Format
DPS       Document Processing System
DPSK      Differential Phase Shift Keying
DPtoTP    Display Coordinates to Tablet Coordinates
          (converting)
DQDB      Distributed Queue Dual Bus
DQL       Data Query Language
DR        Data Received
D/R       Direct or Reverse
DRAM      Dynamic Random Access Memory
DRAW      Direct Read After Write
DR.BOND   Dial-up Router Bandwidth On Demand [NEC]
DRDA      Distributed Relational Database 
	  Algorithm/Architecture [IBM]
DR-DOS    Digital Research-Disk Operating System
DRDW      Direct Read During Write
DRE	  Direct Recording Electronic (voting systems)
DRI       Declarative Referential Integrity +
          Digital Research Incorporated
DRM       Digital Rights/Distributed Resource Management
DRO       Data Request Output + Destructive Read-Out
DRS       Document Registration System
.DRS      Driver Resource (file name extension) [WordPerfect]
DRV       Drive
.DRV      Device Driver (file name extension) (Also see .DVR)
.DRW      Draw + Drawing (file name extensions)
DS        Data Segment + Data Send + Data Server + Double Sided
D/S       Dhrystone Per Second
DS3	  Digital Signal Level 3
DSA       Digital Signature Algorithm + Directory System Agent
DSAP      Destination Service Access Point
DSD       Direct Stream Digital [Sony-Philips]
DSDD      Double Sided, Double Density (diskette)
DSE       Data Storage Equipment
DSEA      Display Station Emulation Adapter
DSECT     Dummy Control Section
DSHD      Double Sided, High Density (diskette)
DSIG	  Digital Signature
DSIS      Distributed Support Information Standard
DSL       Digital Subscriber Line
		ADSL	Asymmetric DSL
		BDSL	Broadband DSL
		CDSL	Consumer DSL [Rockwell]
		FDSL	Fixed Directory Subscriber List
		HDSL	High-Bit-Rate DSL +
			High-Data-Rate DSL
		IDSL	Integrated Services Digital Network DSL
		RDSL	Rate-Adaptive DSL
		SDSL	Single-Line DSL +
			Symmetric DSL
		VDSL	Very-High-Bit-Rate DSL
		VADSL	Very-High-Rate Asymmetric DSL
		VDSL	Very-High-Data-Rate DSL
DSL       Dynamic Simulation Language
DSLAM     Digital Subscriber Line Access Multiplexer
DSM       Distributed Shared Memory +
	  Domain-Specific Modeling
DSMA      Digital Sense Multiple Access
DSML	  Directory Services Markup Language
DSN       Data Source Name + Delivery Service Notification
DSO	  Dynamic Shared Object
DSOM      Distributed System Object Model
DSP	  Delivery Service Partner +
          Digital Signal Processing/Processor +
	  Digital Sound Processor +
          Directory Synchronization Protocol [Lotus]
DSPT      Display Station Pass-Thru [IBM]
DSQD      Double Sided, Quad Density (diskette)
DSR       Data Set Ready + Device Status Register +
          Device Status Report
DSS       Decision Support System + Digital Signature Standard +
          Digital Spread Spectrum + Direct Station Selector
DSSA	  Domain Specific Software Architecture	
DSSI      Digital Standard Systems Interconnect [DEC]
DSSS      Direct-Sequencing Spread Spectrum
DSSSL     Document Style Semantics and Specifications Language
DSTN      Double Supertwisted Nematic
DSU       Data Service/Switching Unit + Digital Service Unit
DSVD      Digital Simultaneous Voice and Data
DSW       Data Status Word + Device Status Word
DSX       Digital Signals Cross-Connect
D2T2      Dye Diffusion Thermal Transfer (printing)
DTA       Disk Transfer Area
.DTA      Data (file name extension)
DTC       Desktop Conferencing
DTCP	  Digital Transmission Copy Protection
	  [Hitachi, Intel, Panasonic, Sony, Toshiba]
DTD       Document Type Definition
DTE       Data Terminal Equipment + Dumb Terminal Emulator
DTF       Distributed Test Facility
DTL       Dialogue Tag Language [IBM] + Diode-Transistor Logic
DTM       Digital Terrain Mapping
DTMF      Data Tone Multiple Frequency + Dual Tone Multifrequency
DTP       Desktop Publishing + Distributed Transaction Process
DTR       Data Terminal Ready + Data Transfer Rate
DTS	  Digital Theatre Systems +
   	  Distributed Traffic Shaping [Cisco]
DTSS      Dartmouth Time Sharing System
DTV       Desktop Video + Digital Television
DTVC      Desktop Video Conferencing
DU        Disk Usage
DUA       Directory User Agent
DUAT      Direct User Access Terminal
DUN       Dial-Up Networking [Microsoft]
DUNCE     Dial Up Network Connection Enhancement
DV        Digital Video
.DV       DESQview Script (file name extension)
DVC       Desktop Video Conferencing + Digital Video Camera
DVD       Digital Video Disk
DVD-A	  Digital Video Disk-Audio
DVD-AR	  Digital Video Disk-Audio Recording
DVD-R     Digital Video Disk-Recordable
DVD-RAM   Digital Versatile Disc-RAM
DVD-ROM   Digital Versatile Disc-ROM
DVD-SR	  Digital Video Disk-Stream Recording
DVD-VR	  Digital Video Disk-Video Recording
DVE       Digital Video Effect
DVI       Digital Video Interactive + Digital Visual Interface
.DVI      Device Independent (file name extension)
DVM       Digital Volt Meter
DVMRP     Distance Vector Multicast Routing Protocol [Internet]
DVOF	  Digital Video Over Fiber
DVR       Digital Video/Voice Recorder
.DVR      Device Driver (file name extension) (Also see .DRV)
DW        Data Warehousing
DWDM      Dense Wavelength Division Multiplexer
DWG       Drawing
DWMT      Discrete Wavelet Multitone
DWT	  Discrete Wavelet Transform
D2X       Decimal To Hexadecimal [REXX]
.DXB      Drawing Interchange Binary (file name extension)
          [AutoCAD]
DXC       Data Exchange Control
DXF       Data Exchange File + Drawing Exchange Format
DXI       Data Exchange Interface
DYNSLT	  Dynamic Select [IBM]
DYNSRC    Dynamic Source

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EA        Effective Address + Extended Attribute [OS/2]
EAI	  Enterprise Application Integration
EAP	  Extensible Authentification Protocol
EAR       Enterprise Archive + External Access Register
EARN      European Academic Research Network
EAROM     Electrically Alterable Read Only Memory
EARS      Electronic Access to Reference Services +
          Electronic Authoring and Routing System [DEC] +
          Explicit Archive and Retrieval System [Langley Research]
EATA      Enhanced AT Bus Attachment
EAX       Environmental Audio Extensions [Creative]
EB        Exabyte (1,024 petabytes)
          (One Billion Billion characters of information)
EBASIC	  Extended BASIC
EBC       EISA Bus Controller
EBCT      Electron Beam Computed Tomography
EBCDIC    Extended Binary Coded Decimal Interchange Code [IBM]
EBI       Equivalent Background Input +
          Extended Background Investigation
EBNF      Extended Backus-Naur Form
EBOOK	  Electronic Book
EBPP	  Electric Bill Presentment and Payment
EBR	  Extended Boot Record
EBT       Electronic Benefits Transfer
EC        Electronic Commerce + Error Control
ECAL      Enjoy Computing And Learn
ECAT      Electronic Card Assembly and Test [IBM]
ECB       Electronic Codebook + Event Control Block
ECC       Elliptic Curve Crypto + Error Check Code +
          Error Checking and Correction + Error Correction Code
ECD       Enhanced Color Display + Enhanced Compact Disk
ECHO      European Commission Host Organization [Internet]
ECI       External Call Interface
ECL       Emitter Coupled Logic
ECM       Electronic Control Module
ECMA      European Computer Manufacturers Association
ECN	  Electronic Communications Network
ECNE      Enterprise Certified NetWare Engineer [Novell]
ECP       Enhanced/Extended Capabilities Port [Microsoft]
ECS       Enhanced Chip Set
ECTL      Electronic Communal Temporal Lobe
ECU       EISA Configuration Utility
ED        Erase Display
EDA       Electronic Design Automation +
          Embedded Document Architecture [Go Corporation]
EDB       Embedded Database
EDC       Electronic Digital Computer +
          Enhanced Data Correction +
          Error Detection and Correction
EDDC      Extended Distance Data Cable
EDE       Encrypt-Decrypt-Encrypt
EDG	  Electronic Program Guide
EDGAR     Electronic Data Gathering, Analysis and Retrieval
EDGE	  Enhanced Data-Rates for Global Evolution
EDI       Electronic Data Interchange +
          Electronic Document Interchange [DEC]
EDIF      Electronic Design Interchange Format
EDIFACT   EDI for Administration Commerce and Transport
EDL       Edit Decision List
EDLC      Ethernet Data Link Control
EDLIN     Editor (Line Text)
EDMS      Electronic Document Management System
EDO       Extended Data Out
EDOS      Enhanced DOS for Windows
EDP       Electronic Data Processing
EDPM      Electronic Data Processing Machine
EDRAM     Enhanced/Eraseable/Extended Dynamic Random Access Memory
EDS       Electronic Data Systems (corporation)
EDSAC   * Electronic Delay Storage Automatic Calculator
EDTV	  Enhanced Definition Television
.EDU      Educational Institutions (Domain Name) [Internet]
EDVAC   * Electronic Discrete Variable Automatic Computer
          (First stored-program digital computer)
EE        Extended Edition [IBM]
EEC       Extended Error Correction
EEG       Electroencephalogram
EEL       Epsilon Extension Language
EEM       Extended Memory Management
EEMAC     Electrical & Electronic Manufacturers of Canada
EEMS      Enhanced Expanded Memory Specification
EEPROM    Electrically Erasable Programmable Read-Only Memory
EES       Escrow Encryption Standard
EFA       Extended File Attribute
EFF       Electronic Frontier Foundation
EFI       Electromechanical Frequency Interference +
          Electronics For Imaging +
	  Extensible Firmware Interface
EFIGS     English, French, Italian, German, Spanish
EFL       Emitter Follower Logic
E-FORM    Electronic Form
EFS       Encrypting File System
EFTS      Electronic Funds Transfer System
EGA       Enhanced Graphics Adapter
EGP       Exterior Gateway Protocol
EGREP     Extended Global Regular Expression Print [Unix]
EHCI	  Enhanced Host Controller Interface
EHLLAPI   Emulator High Level Language Application
          Programming Interface [IBM]
EIA       Electronic Industries Association
EIDE      Enhanced Integrated Drive Electronics
EIM	  Electronic Image Management
EIS       Executive Information System
EISA      Extended Industry Standard Architecture
EJB       Enterprise JavaBeans
EL        Electroluminescent (display) + Erase Line
ELAN      Emulated Local Area Network
ELC       Embedded Linking and Control
ELD	  Electronic License Distribution
ELEC	  Enterprise Local Exchange Carrier
ELF       Executable and Linking Format +
          Extremely Low Frequency
ELOS	  Embedded-Objects Linked Across Systems
ELS       Entry Level System
EM        Electronic Mail + Emphasized + End of Medium +
          Expanded Memory
EMA       Electronic Mail Association +
          Enterprise Management/Memory Architecture
EMACS     Editing Macros [Unix]
E-MAIL    Electronic Mail
EMB       Extended Memory Block [LIM/AST]
EMBARC    Electronic Mail Broadcast to a Roaming Computer
          [Motorola]
EMC       Electromagnetic Compatibility + Enhanced Memory Chip +
          E-Mail Connection + Extended Math Coprocessor
EMCC    * Eckert-Mauchly Computer Company (World's first computer
          company, founded by Presper Eckart and John Mauchly,
          who invented and built the first UNIVAC)
EMF	  Extended Metafile Format [Microsoft]
EMI       Electromagnetic Interference
.EML      Electronic Mail (file name extension)
EMM       Expanded Memory Manager
EMR       Electro-Magnetic Radiation +
          Enhanced Metafile Record
EMS       Electronic Mail System + 
	  Electronic Message Service +
	  Energy Management System +
	  Enhanced Messaging Service +
          Expanded Memory Specification [LIM]
EMSAPI    Extended Messaging Services Application
          Programming Interface
EMWAC     European Microsoft Windows NT Academic Centre
.ENC      Encoded (file name extension)
ENDEC     Encoder/Decoder
ENDS      Ends Segment
ENIAC   * Electronic Numerical Integrator Analyzer and
          Computer (First fully electronic digital computer)
ENQ       Enquiry
ENSS      Exterior Nodal Switching Subsystem [Internet]
EOA       End Of Address
EOB       End Of Block
EOC       End Of Conversion
EOF       End Of File + Enterprise Objects Framework
          [Next Computer]
EOI       End Of Interrupt + End Or Identify
EOJ       End Of Job
EOL       End Of Line + End Of List
EOM       End Of Message
EOR       Exclusive OR (Also XOR)
EOS       Earth Observing System [NASA] + End Of String +
	  Error Correction Code on SIMM
EOSDIS    Earth Observing System Data and Information System [NASA]
EOT	  Embedded Open Type (format) [Microsoft] +
          End Of Table + End Of Tape (marker) + End Of Text +
          End Of Transmission
EP        Electrophotographic Engine
EPC	  Electronic Product Code
EPIC      Explicitly Parallel Instruction Computing (chip) [Intel]
EPL       Effective Privilege Level
EPLD      Electrically Programmable Logic Device
EPM       Enhanced Editor for Presentation Manager [IBM] +
          Enterprise Process Management [IBM]
EPP       Enhanced Parallel Port
EPROCESS  Executive Process
EPROM     Electrically Programmable Read Only Memory +
          Erasable Programmable Read Only Memory
.EPS      Encapsulated PostScript (file name extension)
EPSF      Encapsulated PostScript Files
ERA       Extended Registry Attributes
ERAS      Electronic Routing and Approval System [Hughes Aircraft]
ERD       Emergency Repair Disk + Entity Relationship Diagram
ERIC      Educational Resources Information Center [Internet]
ERLL      Enhanced Run Length Limited
ERMA    * Electronic Recording Method, Accounting
          [General Electric]
EROM      Erasable Read Only Memory
EROS      Earth Resources Observation System
          [U.S. Geological Survey]
ERP	  Effective Radiated Power +
          Enterprise Resource Planning
ERR       Error
ER/RC     Extended Result/Response Code
ERU       Emergency Recovery Utility [Microsoft]
ES        Extra Segment
ESA       Enterprise Systems Architecture [IBM] +
          European Space Agency
ESB	  Enterprise Service Bus
ESC       EISA System Component + Escape
ESCD      Extended System Configuration Data
ESCM      Extended Services Communications Manager [IBM]
ESCON     Enterprise System Connection (Architecture) [IBM]
ESC/P     Epson Standard Code for Printers
ESD       Electronic Software Distribution +
          Electrostatic Discharge + Emergency Startup Disk
ESDI      Enhanced Small/System Device Interface
ESDRAM    Enhanced SDRAM
ESF       Extended Superframe
ESI       End System Identifier +
          Enhanced Serial Interface (specification) [Hayes]
ESMR      Enhanced Specialized Mobile Radio
ESN       Electronic Security/Serial Number
ESP       Emulation Sensing Processor +
          Encapsulating Security Payload (header) +
          Enhanced Serial Port [Hayes] + Enhanced Service Provider +
          Enterprise System Platcorm + Estimated Selling Price +
	  Eudora Sharing Protocol [Qualcomm]
ESR       Event Service Routine
ESS       Electronic Switching System
ESSID	  Extended Service Set Identifier
ESU       Electro-Static Unit
ET        Enhancement Technology
ETACS     Extended Total Access Communication System [IBM]
ETANN     Electrically Trainable Analog Neural
          Network (chip) [Intel]
ETB       End of Transmission Block
ETC       Electronic Toll Collection +
          Enhanced Throughput Cellular (modem protocol) [AT&T]
E-TEXT    Electronic Text
ETF       Enriched Text Format
ETOM      Electron-Trapping Optical Memory
ETPL      Endorsed Tempest Products List
ETS       Econometric Time Series
ETX       End Of Text
EU        Execution Unit
.EU	  European Union (Domain Name) [Internet]
EUC       End User Computing + Extended Unix Code [IBM]
EUDORA    (Named after author of story:
          "Why I Live at the P.O.", Ms. Eudora Welty)
EUI       End-User Interface
EULA	  End-User License Agreement
EUVL	  Extreme Ultraviolet Lithography
EVDO	  Evolution Data Optimized
EVE       Extensible VAX Editor
EVGA      Extended Video Graphics Array +
          Extended Video Graphics Adapter
EWAN      Emulator Without A Good Name [Internet]
EWS       Employee Written Software [IBM]
ExCA      Exchangeable Card Architecture [Intel]
.EXE      Executable (file name extension)
EXE2BIN   Program used to convert an (.EXE) file to binary
          format (.COM) file
EXIF	  Exchangeable Image File Format
EXM       Enterprise Messaging Exchange [Lotus]
EXP       Exponent
EXT       External
EXTRN     External Reference
E-ZINE    Electronic Magazine

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FAB       Computer-Chip Fabrication Plant
FAC       File Access Code
FAMOS     Floating Gate Avalanche MOS
FANS      Future Air Navigation System
FAP       File Access Protocol
FAPI      Family Application Program Interface
FAQ       Frequently Asked Question
FARNET    Federation of American Research Networks [Internet]
FASIC     Function and Algorithm-Specific Integrated Circuit
FAT       File Allocation Table
FAX       Facsimile
.FAX      Fax (file name extension)
FBC	  Find By Content
FC/AL     Fiber Channel/Arbitrated Loop
FCB       File Control Block
FCC       Federal Communications Commission
FCC:      File Carbon Copy
FCCSET    Federal Coordinating Council for
          Science, Engineering and Technology
FC/EL     Fiber Channel/Enhanced Loop
FCI       Flux Changes per Inch
FCL       Fibre Channel Loop
FCPGA	  Flip Chip Pin Grid Array [Intel]
FCR       FIFO Control Register
FCRAM	  Fast-Cycle RAM
FCS       Fiber Channel Standard + Frame Check Sequence
FD        Floppy Disk + Floppy Drive + Full Duplex
FDC       Floppy Disk Controller
FDDI      Fiber Digital Device Interface +
          Fiber Distributed Data Interface
FDHD      Floppy Drive High Density
FDISK     Fixed Disk
FDM       Frequency Division Multiplexing
FDMA      Frequency Division Multiple Access
FDSL	  (See DSL)
FDX       Full Duplex
FEC       Forward Error Correction
FECN      Forward Explicit Congestion Notification
FED       Field Emission/Emitter Display
FEFO      First-Ended, First-Out
FEP       Front End Processor
FEPI      Front End Programming Interface
FEPROM    Flash EPROM
FERAM     Ferroelectric RAM
FESDK     Far East Software Development Kit [Microsoft]
FET       Field Effect Transistor
FF        Flip-Flop + Form Feed
FFDC      First Failure Data Capture [IBM]
FFS       Fast File System
FFST      First Failure Support Technology [IBM]
FFT       Fast Fourier Transform + Final Form Text [IBM]
FG        Floating Gate
FGREP     Fixed Global Regular Expression Print [Unix]
FHS       Fan Heat-Sink
FHSS      Frequency-Hopping Spread Spectrum
FIA	  File Integrity Assessment
FIB	  Forwarding Information Base
FIF       Fractal Image Format
FIFO      First-In, First-Out
FILO      First-In, Last-Out
FINDSTR	  Find Strings
FIP       File Processor Buffering
FIPS      Federal Information Processing Standard
FIR       Fast Infrared + Finite Impulse Response
.FIRM     Business or Firm (Domain Name) [Internet]
FIRST     Forum of Incident Response and Security Teams
FITS	  Flexible Image Transport System
FIU       Fingerprint Identification Unit [Sony]
FIX       Federal Internet Exchange
FK	  Foreign Key
FLA       Four Letter Acronym
FLC       Ferro-electric Liquid Crystal
FLD       Field
FLIR	  Forward Looking Infrared (system)
FLL       FoxPro Link Library [Microsoft Fox Pro]
FLOPS     Floating Point Operations Per Second
.FLR      Folder (file name extension)
FLV	  Flash Video
FMD	  Fluorescent Multilayer Disk
FMRI	  Functional Magnetic Resonance Imaging
FMS       Forms Management System
FMT       Format
FMV       Full Motion Video
FNT       Font
FOCUS     Forum of Control Data Users
FOD       Fax On Demand
FOG       First Osborne Group
FOIP      Fax Over Internet Protocol
FOIRL     Fiber Optic Inter Repeater Link [IEEE]
FOLDOC    Free On-Line Dictionary Of Computing
FOM	  Fiber Optics Modem
.FON      Font + Phone + Phone Directory (all file name
          extensions)
.FOR      Fortran source code (file name extension)
FORTH     (Programming Language)(See HLL)
FORTRAN   Formula Translator (Programming Language)(See HLL)
FOSE      Federal Office Systems Exposition
FOSI      Format Option Specification Instance
FOSSIL    Fido/Opus/Seadog Standard Interface Layer
FPC       Floating Point Calculation
FPCE      Floating-Point C Extension (specification)
FPGA      Field Programmable Gate-Array
FPLA      Field Programmable Logic-Array
FPM       Fast Page Mode
FPP       Fixed Path Protocol + Floating Point Processor
FPR       Floating-Point Register
FPS       Favorite Picture Selection + Frames Per Second
FPT       Forced Perfect Termination
FPU       Floating Point Unit
FPX	  FlashPix (format) [Kodak]
FQDN      Fully Qualified Domain Name [Internet]
FRAD      Frame Relay Access Device +
          Frame Relay Assembler/Disassembler
FRAG      Fragment + Fragmentation
FRAM      Ferroelectric Random-Access Memory
FRC       Functional Redundancy Checking
FRED      Frame Editor + Front-End to Dish
FRMR	  Frame Reject
FRPI      Flux Reversals Per Inch
.FRS      WordPerfect Graphics Driver (file name extension)
FS        File Separator
FSB       Front Side Bus
FSD       File System Driver [OS/2]
FSE       Full Screen Editor
FSF       Free Software Foundation [Internet]
FSK       Frequency Shift Keying
FSN       Full Service Network
FSO	  Free Space Optics
FSP       File Service Protocol
FSR       Free System Resources
FST       Flat Square Tube (monitor)
F/T       Full Time
FTAM      File Transfer, Access and Management +
          File Transfer and Access Method
FTL       Flash Transition Layer [Intel]
FTM       Flat Tension Mask [Zenith]
FTP       File Transfer Protocol [Internet]
FTPD      File Transfer Protocol Daemon
FTTB	  Fiber To The Basement
FTTC      Fiber To The Curb
FTTN	  Fiber To The Neighborhood
FTS       Federal Telecommunication System
FTX       Fault Tolerant Unix
FUI       File Update Information
FUNC      Function
FUS	  Fast User Switching
FVT       Full Video Translation
FWTK	  Firewall Toolkit
FXP	  File Exchange Protocol
FYI       For Your Information

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GA        General Availability
GAAP      Generally Accepted Accounting Principles
GAC	  Global Assembly Cache
GAL       Generic Array Logic
GAMS	  General Algebraic Mathematical System
GAPI      Gateway Application Programming Interface
GART      Graphics Address Relocation Table
GATT      Graphics Address Translation Table
GAWD	  Global Access Wireless Database
Gb        Gigabit (1,024 megabits) +
          (One Billion Bits of Information)
GB        Gigabyte (1,024 megabytes) +
          (One Billion Characters of Information)
GCC       GNU C-Compiler [Unix]
GCCD      Glass-Passivated Ceramic Chip Diode
GCR       Group Code Recording
GDA       Global Data Area + GNOME Data Access
GDB	  GNU Debugger
GDDM      Graphics Data Display Manager
GDG       Generation Data Group [IBM]
GDI       Graphical Device Interface
GDLC      Generic Data Link Control [IBM]
GDP       Graphic Draw Primitive
GDT       Geometric Dimensioning and Tolerancing +
          Global Descriptor Table +
          Graphics Development Toolkit
GECOS     General Electric Comprehensive Operating System
GEIS      General Electric Information Service (company)
GEM       Graphics Environment Manager (DRI Program)
GENIE     General Electric Network for
          Information Exchange
GEO       Geostationary Earth Orbit
GEOS	  Global Entity Ordering System +
GEOS      Graphic Environment Operating System [Geoworks]
GET       Get Execute Trigger
GFI       General Format Identifier + Ground-Fault Interceptor
GGP       Gateway-Gateway Protocol [Internet]
GHZ       Gigahertz
.GID      Topics (file name extension) [Microsoft]
.GIF      Graphics Interchange Format (file name extension)
GIG-E	  Gigabit Ethernet
GIGO      Garbage In, Garbage Out
GII       Global Information Infrastructure
GILS      Government Information Locator Service
GIMP	  GNU Image Manipulation Program
GIMPS     Great Internet Mersenne Prime Search
GINA      Graphical Identification and Authentication
GIS       Geographic Information System +
          Global Information Solutions [AT&T]
GIX       Global Internet Exchange [Internet]
GKS       Graphical Kernel System
GL        Graphics Language
G/L       General Ledger
GLIS      Global Land Information System [US Geological Survey]
GLM       General Linear Models
GLOBE     Global Learning by Observations to Benefit
          the Environment [Internet]
.GLY      Glossary (file name extension) [Microsoft Word]
GMDI	  Gigabit Media-Dependent Interface
GML       Generalized Markup Language
GMP       Global Mobile Professional
GMR       Giant Magneto-Resistive (read head technology)
GMS       Global Management System +
          Global Messaging Service [Novell]
GMT       Greenwich Mean Time
GND       Ground (signal/system)
GNN       Global Network Navigator
GNU       Gnu's Not Unix (operating system)
GNOME     GNU Network Object Model Environment
GOAD	  GNOME Object Activation Directory
GOS	  Grade Of Service
GOSIP     Government Open Systems Interconnection Profile
.GOV      Governmental (Domain Name) [Internet]
GP        Gas Plasma + General Purpose
GPF       General Protection Fault
GPI       Graphics Programming Interface
GPIB      General Purpose Information/Interface Bus
GPIO	  General Purpose Input/Output
GPL	  General Public License
GPR       General Purpose Register [IBM]
GPRC      Glass Passivated Rectifier Chip
GPRS	  General Packet Radio Service
GPS       Global Positioning Satellite/System +
          Global Product Specification
GPSS    * General Purpose Systems Simulator (language)
GPU       Graphics Processing Unit
GRADD     Graphics Adapter Device Driver [IBM]
GRE       Generic Routing Encapsulation + Graphics Engine
GREP      Global Regular Expression Print
.GRF      Graph (file name extension)
.GRP      Group (file name extension)
GS        Group Separator
GSI       General Server Interface
GSM       Global Shared Memory +
          Global System for Mobile-Communications (network)
GSNW      Gateway Service for NetWare [Microsoft]
GSP       Generic Server Passer + Global Service Provider
GSR	  Gigabit Switch Router
GSTN      General Switched Telephone Network
GTE       General Telephone Electronics (corporation)
GTF       Generalized Timing Format
GTL       Gunning Transceiver Logic
GTO       Guide To Operations [IBM]
GTP     * Geometry Theorem Prover
GTS	  Generic Traffic Shaping [Cisco]
GUI       Graphical User Interface
GUID      Globally Unique Identifier +
          Global Universal Identifier
GVT       Global Virtual Time
GW-BASIC  Gee Whiz BASIC
GWES	  Graphic, Windowing and Event Subsystem
.gz       Compressed file (compressed filename extension -
          using GNU gzip compression/decompression program) [Unix]
GZIP      GNU Zip

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.H        Header (file name extension) [C]
HACMP     High Availability Cluster Multi-Processing [IBM]
HAL       Hard Array Logic + Hardware Abstraction Layer +
          House-Programmed Array Logic
HAL     * Heuristically Programmed Algorithmic (computer)
          [from 1968 movie "2001: A Space Odyssey"]
HAP       Host Access Protocol
HARP-MRI  Harmonic Phase MRI
HASP      Houston Automatic Spooling Priority (System)
HBA       Host Bus Adapter
HCL       Hardware Compatibility List
HCSS      High Capacity Storage System
HCU       Home Computer User
HD        Hard Disk + High Density
HDA       Head Disk Assembly
HDC	  High Dependability Computing [Carnegie Mellon]
HDCD      High Definition Compatible Digital
HDCP	  High-Bandwidth Digital Content Protection
HDD	  Hard Disk Drive
HDF       Hierarchical Data Format [NCSA]
HDI       Head to Disk Interference
HDL       Hardware Description Language
HDLC      High-Level Data Link Control
HDM       Hardware Device Module
HDMI	  High-Definition Multimedia Interface
HDML      Handheld Device Markup Language
HDR       Header + High Data Rate
.HDR	  Header Data (file name extension)
HDSC      High Density Signal Carrier [DEC]
HDSL      (See DSL)
HDSS      Holographic Data Storage System
HDT       Host Digital Terminal
HDTV      High Definition Television
HDVD      High Definition Volumetric Display
HDW       Hardware
HDX       Half Duplex
HEOS	  High Earth Orbiting Satellite
HERC      Hercules
HEX       Hexadecimal
HFC       Hybrid Fiber-Coaxial
HFS       Hierarchical File System [Macintosh]
HFT       High Function Terminal [IBM]
HGA       Hercules Graphics Adapter
HGCP      Hercules Graphics Card Plus
HGP	  Human Genome Project
HH        Hour
HID	  Human Interface Device
HIDS	  Host-Based Intrusion Detection System
HIF       Hyper-G Interchange Format
HIFD      High-Density Floppy Disk
HIL       Human Interface Link [HP]
HIMEM     High Memory
HIPPI     High Performance Parallel Interface
HLA	  High Level Architecture
HLCO      High Low Close Open
HLL       High Level Language
HLLAPI    High Level Language Application Programming Interface
.HLP      Help (file name extension)
HLQ       High Level Qualifier
HLS       Hue, Luminance, Saturation (color model)
HLT       Halt
HMA       High Memory Area [Microsoft] +
          Hub Management Architecture
HMD       Head Mounted Display
HMI	  Human-Machine Interface
HMM       Hidden Markov Model
HMMP      Hyper-Media Management Protocol
HMOS      High Density Metal Oxide Semiconductor +
          High Speed Metal Oxide Semiconductor
HMP       Host Monitoring Protocol
HOL	  High Order Logic
HOLAP	  Hybrid OLAP
HOTT      Hot Off The Tree (electronic newsletter)
HOV       High Occupancy Vehicle
HP        Hewlett-Packard (Company)
HPC       Handheld Personal Computer
HPCC      High Performance Computing and Communications
HPDJ      Hewlett-Packard Desk Jet
HPFS      High-Performance File System
HPG       Hewlett-Packard Graphics
HPGL      Hewlett-Packard Graphics Language
HPIB      Hewlett-Packard Interface Bus
HPLJ      Hewlett-Packard Laser Jet
HPOM      Home Page Objects Model [Microsoft]
HPPA      Hewlett-Packard Precision Architecture
HPPI      High Performance Parallel Interface
HPR       High Performance Routing [IBM]
HPSB      High Performance Serial Bus
HPTL	  High Performance Technical Computing
HPUX      Hewlett-Packard Unix
HPW       High Performance Workstation [Sun]
.HQX      BinHex (file name extension) [Macintosh]
HRIS      Human Resource Information System
HRG       High Resolution Graphics
HRMS      Human Resource Management System
HRTF      Head Related Transfer Function
HS        High Speed
HSB       Hue, Saturation, Brightness (color model)
HSC       Hierarchical Storage Controller + High Speed Channel
HSI       Hue, Saturation, Intensity
HSM       Hierarchical Storage Management
HSP       High Speed Printer/Processor
HSSI      High Speed Serial Interface
HST       High Speed Technology [U.S. Robotics]
.HST      History + Host (file name extensions)
HSV       Hue Saturation Value
HTL	  Human In The Loop
HTML      HyperText Markup Language
HTTP      HyperText Transfer Protocol
HTTP-NG   HTTP Next Generation
HTTPS     HyperText Transfer Protocol Secure
HUD       Heads Up Display
HUT       Hopkins Ultraviolet Telescope
H/V       Horizontal/Vertical
HVP       Horizontal & Vertical Position
H/W       Hardware
HWCP      Hardware Code Page
HWD       Height-Width-Depth
HWDM	  Hyperfine Wave Division Multiplexing
.HYP      Hyphenation (file name extension)
HYTELNET  Hypertext-browser for Telnet Accessible Sites
Hz        Hertz

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IA	  Intel Architecture [Intel]
IAB       Internet Architecture Board
IAC       Inter-Application Communication [Macintosh]
IAD	  Integrated Access Device
IAEC	  International Address Element Code
IAG       Instruction Address Generation
IAK       Internet Access Kit [IBM]
IAL     * International Algebraic Language
          (ALGOL was first called IAL)
IANA      Internet Assigned Numbers Authority
IAP       Internet Access Provider
IAS       Internet Access Server
IAT       Import Address Table
IAUP      Internet User Account Provider
IBC       Instrument Bus Computer
iBCS      Intel Binary Compatibility Specification
IBIP      Information Based Indicia Program [U.S. Postal Service]
IBL	  Inbound Links [Google]
IBM       International Business Machines (Corporation)
IBM-GL    IBM Graphics Language
IC        Input Circuit + Integrated Circuit + Interrupt Controller
ICA       Intelligent Console Architecture +
          Intra-application Communications Area
ICANN	  International Corporation for Assigned Names and Numbers
ICAP      Internet Calendar Access Protocol [Lotus]
ICAS      Intel Communicating Applications Specifications
ICB       Internet Citizen's Band
ICCP      Institute for the Certification of
          Computing Professionals
ICD       International Code Designator
ICE       In-Circuit Emulator [Intel] +
          Integrated Computing Environment [Langley Research] +
	  Internal Compiler Error
ICES      Interference-Causing Equipment Standard
ICF	  Internet Connection Firewall [Microsoft]
ICI       Image Component Information + Inter-CPU Interrupts
ICL       Interface Clear
ICLID     Incoming-Call Line Identification
ICM       Image Color Matching [Kodak] + Incoming Message
.ICM      Image Color Management (file name extension)
ICMP      Internet Control Message Protocol [Novell]
.ICO      Icon (file name extension)
ICOMP     (iCOMP)Intel Comparative Microprocessor 
	  Performance [Intel]
ICP       Image Coprocessor + Integrated Channel Processor
ICQ       I Seek You (messaging program0
ICR       Intelligent Character Recognition
ICS       Internet Connection Sharing [Microsoft] +
          Intuitive Command Structure
ICSAPI    Internet Connection Services API
ICU       Instruction-Cache Unit +
          Intel Configuration Utility [Microsoft] +
          ISA Configuration Utility
ID        Identification + Identifier
IDA       Integrated Digital Access + Intelligent Disk Array +
          Intelligent Drive Array
IDAPI     Integrated Database Application Programming Interface
IDC       Integrated Database/Desktop Connector +
          Internet Database Connector [Microsoft] +
	  Internet Data Center
IDDE      Integrated Development & Debugging Environment [Symantec]
IDE       Imbedded Drive Electronics +
          Integrated Development Environment [Borland] +
          Integrated Device/Drive Electronics +
          Intelligent Drive Electronics +
          Interactive Design and Engineering +
          Interface Design Enhancement
IDEA      International Data Encryption Algorithm
IDEN	  Integrated Data Enhanced Network
IDF       Intermediate Distribution Frame
IDI       Initial Domain Identifier
IDIV      Integer Divide
IDL       Interactive Data Language +
          Interface Definition Language
IDM       Integrated Document Management
IDMS      Integrated Data Base Management System
IDNX      Integrated Digital Network Exchange [IBM]
IDP       Integrated Data Processing
IDR       Intelligent Document Recognition
IDS	  Intrusion Detection System
IDSL      (See DSL)
IDT       Interface Design Tool + Interrupt Descriptor Table
.IDX      Index (file name extension)
IE        Internet Explorer [Microsoft]
IEC       International Electrotechnical Commission
IEEE      Institute of Electrical and Electronics Engineers
IEF       Information Engineering Facility
IEMSI     Interactive Electronic Mail Standard
          Identification
IEN       Internet Engineering Notes
IETF      Internet Engineering Task Force
IESG      Internet Engineering Steering Group
I/F       Interface
IFC       Internet Foundation Classes
IFD       Image File Directory
IFF       Interchangeable File Format [Amiga]
IFG       Incoming Fax Gateway
IFP       Instruction Fetch Pipeline
IFS       Installable/Integated File System
IFSM      Information Systems Management
IGA       Integrated Graphics Array
IGC       Integrated Graphics Controller
IGES      Initial Graphics Exchange Standard
IGFET     Insulated-Gate Field Effect Transistor
IGMP      Internet Group Multicast Protocol
IGP       Interior Gateway Protocol
IGRP      Interior Gateway Routing Protocol [Cisco]
IGS       Internet Go Server
IHD       Integrated Help Desk [IBM]
IHV       Independent Hardware Vendor
IIF       Immediate Interface
III       Interstate Identification Index [NCIC]
IIOP      Internet Inter-ORB Protocol
IIR       Immediate Impulse Response
IIS       Internet Information Server/Services [Microsoft]
IITF      Information Infrastructure Task Force
IKE	  Internet Key Exchange
IKMP      Internet Key Management Protocol
IKP       Internet Keyed Payments [IBM]
ILA       Image Light Amplifier
ILE       Integrated Language Environment [IBM]
ILEC	  Incumbent Local Exchange Carrier
ILP       Instruction-Level Parallelism
ILS       International Language Support
IM	  Instant Messenger
IMAC      Internet Macintosh [Apple]
IMACS     Image Management and Communication System
IMAP	  Interactive Mail Access Protocol +
          Internet Message Access Protocol
IMAX      Maximum Image
IMDB      In-Memory Database
IMDS      Image Data Stream (format) [IBM]
IME       Input Method Editor
IMEI	  International Mobile Equipment Identifier
IMG       Image
.IMG	  Image Data (file name extension)
IML       Initial Microcode Load [IBM]
IMP       Information/Interface Message Processor
IMPA      Intelligent Multi-Port Adapter [DCA]
IMPI	  Interoperable Message Passing Interface
IMPP	  Internet Messaging and Presence Protocol
IMR       Internet Monthly Report
IMS       Information Management System +
          Intermediate Maintenance Standards
IMSI	  International Mobile Subscriber Identifier
IMSP      Internet Message Support Protocol
IMTC      International Multimedia Teleconferencing Consortium
IMTV      Interactive Multimedia Television
IMUL      Integer Multiply
IMUX      Inverse Multiplexer
IN        Input
INC       Increment
.IND      Index (file name extension)
.INF      Information (file name extension)
.INFO     Information Services (Domain Name) [Internet]
INFS      Internet Network File System
.INI      Initialize (file name extension)
INIT      Initialization + Initialize
INM       Integrated Network Management
INND      Internet News Daemon
INS       Input String + Integrated Network Server
INT       Integer + Internal + Interrupt +
.INT      International Organization (Domain name) [Internet]
INTA      Interrupt Acknowledge
INTEL	  Integrated Electronics (company)
INTERNIC  (InterNIC)Internet Network Information Center
INTO      Interrupt if Overflow occurs
I2O       Intelligent Input/Output
I/O       Input/Output
IOC       Inter-Office Channel
IOCC      Input/Output Channel Converter +
          Input/Output Controller Chip
IOCS      Input/Output Control System
IOCTL     Input/Output Control
IODE      Integrated Development and Debugging
          Environment [Symantec]
IOF	  Infrared Optical Film
IOP       Input/Output Processor
IOPL      Input/Output Privilege Level
IOR       Interoperable Object Reference
IOS	  Internet Operating System
IOSGA     Input/Output Support Gate Array
IP        Instruction Pointer + Intellectual Property +
	  Internet Protocol
IPBF      Installed Peripheral Base Flexibility
IPC       Instructions Per Clock + Interprocess Communication
IPCMOS	  Interlocked Pipeline CMOS [IBM]
IPCP      Internet Protocol Control Protocol
IPCS      Integrated PC Server
IPDC      Internet Protocol Device Control
IPDS      IBM Personal Dictation System [IBM] +
          Intelligent Printer Data Stream [IBM]
IPF	  Invalid Page Format
IPFC      Information Presentation Facility Compiler [IBM]
IPI       Intelligent Peripheral Interface
IPL       Initial Program Load/Loader +
          Ion Projection Lithography
IPL     * Information Programming Language
IPM       Images Per Minute + Interpersonal Message
IPMI      Intelligent Platform Management Interface
IPNG      Internet Protocol, next generation
IPP	  Integrated Performance Primitives [Intel] +
          Internet Printing Protocol
IPR	  Intellectual Property Rights
IPSE      Integrated Project Support Environment
IPSEC	  Internet Protocol Security
IPTC      International Press Telecommunications Council
IPX       Internetwork Packet Exchange [Novell]
IQL       Interactive Query Language
IR        Infrared
IRC       Internet Relay Chat
IRD       Integrated Receiver/Descrambler
IRDA      (IrDA)Infrared Data Association
IRDS      Information Resource Dictionary System
IRET      Interrupt Return
IRF       Intermediate Routing Function +
          Inheritance Rights Filter [Novell]
IRL       Interactive Reader Language + Inter-Repeater Link
IRLAP     Infrared Link Access Protocol
IRLED     Infrared Light Emitting Diode
IRM       Information Resource Management + Inherent Rights Mask
IRP	  I/O Request Packet
IRQ       Interrupt Request
IRQL	  Interrupt Request Level
IRTF      Internet Research Task Force
IRX       Information Retrieval Experiment
IS        Information System + Interrupt Status
ISA       Industry Standard Architecture (bus) [IBM] +
          Instruction-Set Architecture
ISAKMP	  Internet Security Association and Key Management Protocol
ISAM      Indexed Sequential-Access Management/Method
ISAPI     Internet Server API [Microsoft]
ISBN      International Standard Book Number
ISC       Instruction Set Computer + Inter-Systems
          Communication [IBM]
ISCSI	  (iSCSI) Internet SCSI
ISD       Image Section Descriptor +
          Instructional Systems Design
ISDN      Integrated Services Digital Network
ISH       Information Super Highway
ISI       Internally Specified Index
ISIS      Integrated Systems and Information Services
ISKM      Internet Starter Kit for the Macintosh
ISL       Interactive System Language +
	  Inter Switch Link [Cisco]
ISM       Integrated Services Model [IETF] +
          Internet Service Manager [Microsoft]
ISMF      Interactive Storage Management Facility
ISOC      Internet Society
ISO       International Organization for Standardization
ISP       Internet Service Provider + Interrupt Stack Pointer +
          Interrupt Status Port
ISPF      Interactive System Programming Facility
ISR       Information Storage and Retrieval +
          Interrupt Service Routine +
          Interrupt Status Register
ISRC	  International Standard Recording Code
ISS	  Internet Sharing Software
ISSN      International Standard Serial Number
ISV       Independent Software Vendor
IT        Information Technology
ITB       Information Technology Branch + Intermediate Text Block
ITC       International Typeface Corporation
ITE       Information Technology Equipment
ITF       Interactive Test Facility
ITIL	  Information Technology Infrastructure Library
ITN       Identification Tasking and Networking
ITP	  Internet Transaction Processing
ITR	  Information Technology Research [NSF] +
          Input Transaction Record + Internet Talk Radio
ITSM	  Information Technology Service Management
ITU       International Telecommunications Union
ITUG      International Telecommunications User Group
ITU-TIES  ITU-Telecom Information Exchange Services
ITU-TSS   ITU-Telecommunication Standards Section
ITV       Interactive Television
ITX       Intermediate Text Block
IU        Integer Unit
IUAP      Internet User Account Provider
IUS/ITB   Interchange Unit Separator/Intermediate Transmission
          Block
IVDS      Integrated Voice and Data Systems
IVIS      Interactive Video Information System
IVL       Independent Vendor League + Intel Verification Lab
IVR       Interactive Voice Response
IVS       Interactive Videodisk System
IVT       Interrupt Vector Table
IV&V      Independent Verification & Validation
I-WAY     Information Highway
IXC       Interexchange Carrier

J...

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JA        Jump Address + Jump if Above
JAD       Joint Application Design/Development
JADE	  Java Addition to the Default System
JAE       Jump if Above or Equal
JANET     Joint Academic Network
JAR       Java Archive (file format)
JAXM	  Java API for XML Messaging
JBE       Jump if Below or Equal
JC        Jump if Carry set
JCA	  Java Cryptography Architecture
JCE	  Java Cryptography Extension
JCL       Job Control Language
JDBC      Java Database Connectivity
JDF	  Job Description format
JDK       Java Development Kit
JDSL	  Java Data Structures Library
JE        Jump if Equal
JEDEC     Joint Electronic Devices Engineering Council
JEIDA     Japanese Electronics Industry Development Association
JEPI      Joint Electronic Payment Initiative
JES       Job Entry System
JFC       Java Foundation Classes
JFET      Junction Field Effect Transistor
JFIF      JPEG File Interchange Format
JFS       Journaled File System [IBM]
JG        Jump if Greater
JGE       Jump if Greater or Equal
JIPS      JANET Internet Protocol Service
JIT       Just-In-Time (compiler)
JL        Jump if Less
JLE       Jump if Less than or Equal to
JLIP      Joint Level Interface Protocol
JMAPI     Java Management Application Program Interface
JMF       Java Media Framework [Sun]
JMI	  Java Metadata Interface
JMP       Jump
JMS       Java Message Service
JMX	  Java Management Extensions
JNA       Jump if Not Above
JNAE      Jump if Not Above or Equal
JNB       Jump if Not Below
JNBE      Jump if Not Below or Equal
JNG       Jump if Not Greater
JNGE      Jump if Not Greater or Equal
JNI       Java Native Interface
.JNK      Junk (file name extension)
JNLE      Jump if Not Less or Equal
JNO       Jump if No Overflow
JNP       Jump if No Parity
JNS       Jump if No Sign
JOE       Java Objects Everywhere
JOHNNIAC* John Neumann Integrator and
          Automatic Computer [Rand Corp.]
JOSS    * Johnniac Open Shop System [Rand Corp.]
JPE       Jump if Parity Even
JPEG      Joint Photographic Experts Group
JPL       Jet Propulsion Laboratory
JPNF	  Join-Projection Normal Form
JPO       Jump if Parity Odd
JRE       Java Runtime Environment
JS        Jump if Sign
JSP	  Java Server Page
JSSE	  Java Secure Socket Extension
JTAG	  Joint Test Action Group [IEEE]
JTAPI     Java Telephony Application Programming Interface
JZ        Jump if Zero
JNZ       Jump if Not Zero
JSS       Java-Script Style Sheet
JUGHEAD   Jonzy's Universal Gopher Hierarchy
          Excavation and Display [Internet]
JVM       Java Virtual Machine

K...

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K-12      Kindergarten through 12th Grade [US Education System]
KAM       Keep Alive Memory
Kb        Kilobit
KB        Keyboard + Kilobyte (1,024 bytes)
KBD       Keyboard (also KEYB)
KBD$      Keyboard [OS/2]
KBE       Knowledge Based Engineering
Kbps      Kilobits Per Second
KBps      Kilobytes Per Second
KDE	  K Desktop Environment
KDT       Key Definition Table
KEFIR     Key Findings Reporter [GTE]
KEYBBE    Foreign language KEYBoard program - Belgium
KEYBBR    Foreign language KEYBoard program - Brazil
KEYBCF    Foreign language KEYBoard program - Canadian-French
KEYBCZ    Foreign language KEYBoard program - Czechoslovakia
(Czech)
KEYBDK    Foreign language KEYBoard program - Denmark
KEYBFR    Foreign language KEYBoard program - France
KEYBGR    Foreign language KEYBoard program - Germany
KEYBHU    Foreign language KEYBoard program - Hungary
KEYBIT    Foreign language KEYBoard program - Italy
KEYBLA    Foreign language KEYBoard program - Latin America
KEYBNL    Foreign language KEYBoard program - Netherlands
KEYBNO    Foreign language KEYBoard program - Norway
KEYBPL    Foreign language KEYBoard program - Poland
KEYBPO    Foreign language KEYBoard program - Portugal
KEYBSF    Foreign language KEYBoard program - Swiss-French
KEYBSG    Foreign language KEYBoard program - Swiss-German
KEYBSL    Foreign language KEYBoard program - Czechoslovakia
(Slovak)
KEYBSP    Foreign language KEYBoard program - Spain
KEYBSU    Foreign language KEYBoard program - Finland
KEYBSV    Foreign language KEYBoard program - Sweden
KEYBUK    Foreign language KEYBoard program - United Kingdom
KEYBUS    Foreign language KEYBoard program - United States
KEYBYU    Foreign language KEYBoard program - Yugoslavia
KHz       Kilohertz
KIF       Knowledge Interchange Format
KIPS	  Kodak Internet Print Service [Kodak]
KIS       Knowbot Information Service [Internet]
KPI       Kernel Programming Interface
KQML      Knowledge Query and Manipulation Language
KRS	  Knowledge Retrieval System
KSDS	  Keyed Sequential Data Set
KSH       Korn Shell (program) [Unix]
KSPH      Keystrokes Per Hour
KSR       Keyboard Send Receive
KVM	  Keyboard, Video, Mouse (switch) +
	  Kilobyte Virtual Machine

L...

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L2F       Layer Two Forwarding [Cisco]
L2TP      Layer Two Tunneling Protocol
LADDR     Layered Device Driver Architecture [Microsoft]
LALL      Longest Allowed Lobe Length
LAN       Local Area Network
LANACS    Local Area Network Asynchronous Connection Server
LANDP     LAN Distributed Platform
LANE      Local Area Network Emulation
LANG      Language
LAP	  Linux Application Platform
LAPB      Link Access Procedure Balanced (protocol)
LAPD      Link Access Procedure on the D-Channel (protocol)
LAPM      Link Access Procedure for Modems
LAR       Load Access Rights
LASER     Light Amplification by Stimulated Emission of Radiation
LASTport  Local Area Storage Transport (protocol) [DEC]
LAT       Local Access Terminal +
          Local Area Transport [DEC]
LATA      Local Access and Transport Area
LAVC      Local Area VAX Cluster
LAWN      Local Area Wireless Network
LB        Left Button (of 2 or 3 button Mouse)
LBA       Logical Block Addressing
LBL       Label
LBR       Librarian
.LBR      Library (file name extension)
LBT       Listen Before Talk
LBX       Local Bus Accelerator
LCA       Lotus Communications Architecture [Lotus]
LCC       Leadless Chip Carrier
LCCM	  LAN Client Control Manager [IBM]
LCD       Liquid Crystal Display + Lowest Common Denominator
LCF       Low Cost Fiber
LCK       Library Construction Kit [Microsoft FoxPro]
LCOS	  (LCoS) Liquid Crystal on Silicon
LCP       Link Control Protocol
LCR       Least Cost Routing + Line Control Register
LCS	  Link Connection Subsystem
LCSD      Laminate Chip Signal Diode
LCU       Last Cluster Used
LDA       Logical Device Address
LDAP      Lightweight Directory Access Protocol [IBM]
LDC       Lotus Development Corporation
LDDS      Long Distance Discount Services (company)
LDM       Logical Disk Manager + Long Distance Modem
LDP	  Label Distribution Protocol
LDT       Local Descriptor Table
LE        Less or Equal
LEA       Load Effective Address
LEAD	  Live Early Adoption and Demonstration [W3C]
LEAF      Law Enforcement Access Field
LEC       Local Area Network Emulation Client +
          Local Exchange Carrier
LED       Light Emitting Diode
LEL       Link, Embed and Launch-to-edit [Lotus]
LEM       Language Extension Module
LEN       Low Entry Networking
LEO       Low Earth Orbit
LEP	  Light-Emitting Polymers
LES       Local Area Network Emulation Server
.LET      Letter (file name extension)
LEX       Lexicon
LF        Line Feed
L2F	  Layer 2 Forwarding (protocol) [Cisco]
LFAP      Lightweight Flow Admission Protocol
LFE	  Low Frequency Effects
LFI       Last File Indicator
LFM	  Log File Monitor
LFN       Long File Name
LFT       Low Function Terminal [IBM]
LFU       Least Frequently Used
LGA       Leadless Grid Array
LGDT      Load Global Descriptor Table
LGPL  	  Lesser General Public License
LIAS      Library Information Access System
.LIB      Library (file name extension)
LIC       Line Interface Coupler [IBM]
LICS      Lotus International Character Set [LDC]
LIDT      Load Interrupt Descriptor Table
LIEP      Large Internet Exchange Packet [Novell]
LIF       Low Insertion Force
LIFO      Last In, First Out
LILO      Last In, Last Out
LIM       Lotus/Intel/Microsoft
LIMA      Lotus/Intel/Microsoft/AST
LIMDO     Light Intensity Modulation Direct Overwrite
LIMM      Light Intensity Modulation Method
LIMS      Library Information Management System
LINUX     (Operating system named after Linus Torvalds)
LIP       Large Internet Packet
LIPO	  (LiPo) Lithium Polymer (battery)
LIPS      Lightweight Internet Person Schema +
          Logical Inferences Per Second
LISP      List Processing (Language)(See HLL)
LISTSERV  List Server [Internet]
LIU       LAN Interface Unit
LIW       Long Instruction Word
LLC       Logical Link Control
LLDT      Load Local Descriptor Table
LLF       Low Level Format
LMB       Left Mouse Button
LMBCS     Lotus Multi-Byte Character Set [Lotus]
LMD       Last Modification Date
LMDS      Local Multipoint Distribution Service
LMI       Link/Local Management Interface
LMOS	  Leave Mail On Server
LMS       Lotus Messaging Switch [Lotus]
LMSW      Load Machine Status Word
LMU       LAN Management Utilities [IBM] +
          LAN Manager for Unix
LN        Load Number + Logarithm (Natural)
LNA	  Local Network Administrator
LN:DI     Lotus Notes:Document Imaging
LNK       Link
LOB       Line of Business
LOC       Lines Of Code + Loop On-Line Control
LOCIS     Library of Congress Information System
LOD       Letter Of Destruction + Level Of Detail
LODSB     Load String Byte
LOG       Logarithm (Base 10)
LOGO      (Programming Language)(See HLL)
LON       Local Operating Network
LOOPE     Loop while Equal
LOOPNE    Loop while Not Equal
LOOPNZ    Loop while Not Zero
LOOPZ     Loop while Zero
LORE      Line Oriented Editor
LPAR      Logic Programming and Automated Reasoning
LPC       Local Procedure Call
LPD       Line Printer Daemon (protocol) [Berkley]
LPDU	  Logical Protocol Data Unit
LPI       Lines Per Inch
LPL       Lotus Programming Language [Lotus 1-2-3] [LDC]
LPM       Lines Per Minute
LPN       Logical Page Number
LPR       Line Printer + Line Printer Remote
LPS       Low-Power Schottky
LPT       Line Printer Terminal
LPT1      First Parallel Printer Port
LPT2      Second Parallel Printer Port
LPT3      Third Parallel Printer Port
LQ        Letter Quality
LQM       Link Quality Monitoring (protocol)
LR        Link Register
LRC       Local Register Cache +
          Longitudinal Redundancy Check
LRL       Least Recently Loaded
LRM       Language Reference Manual + Least Recently-Used Master
.LRS      Language Resource (file name extension) [WordPerfect]
LRU       Least Recently Used
LSA       LAN and SCSI Adapter [IBM] + Line Sharing Adapter +
          Local Security Authority [Microsoft]
LSAPI     License Services Application Program Interface
LSASS	  Local Security Authority Subsystem Service [Microsoft]
LSB       Least Significant Bit
LSC       Least Significant Character
LSD       Least Significant Digit
LSI       Large Scale Integration
LSL       Link Support Layer + Load Segment Limit
LSP	  Layered Service Provider [Spybot]
LSPR	  Logistics System Program Review
LST       List
.LST      List (file name extension)
LTO       Linear Tape Open
L2TP	  Layer 2 Transport/Tunneling Protocol
LTPS	  Low-Temperature Polysilicon
LTR       Left-To-Right + Letter + Load Task Register
LU        Logical Unit (Also LUN)
LUA       Logical Unit Application (interface)
LUI       Local User Input
LUIS      Library User Information Service
LUN       Logical Unit Number
LUT       Lookup Table
LV        Logical Volume [IBM]
LVDS      Low-Voltage Differential Signaling
LVM       Logical Volume Management [IBM]
LW        Lazy Write
.LYR      Lyrics (music file name extension)
LZW       Lempel-Ziv-Welch (algorithm)

M...

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mA        Milliampere
MAC       Macintosh (Apple Macintosh Computer) +
          Mandatory/Media/Medium Access Control +
          Message Authentication Code
MAC     * Multiple Access Computers
.MAC      MacPaint (file name extension) +
          Macro (file name extension)
MACH      Multilayer Actuator Head [Epson]
MADE      Manufacturing and Automated Design Engineering
MADYMO    Mathematical Dynamic Modeling [TNO]
MAE       Merit Access Exchange + Metropolitan Area Ethernet
MAGMA     Minimal Architecture for Generalized Markup Applications
MAH       (mAh)Milliampere-Hour
MAI       Multiple Applications Interface
.MAI      Mail (file name extension)
MAJC      Microprocessor Architecture for Java Computing [Sun]
MALWARE	  Malicious Software
MAN       Manual [Unix] + Metropolitan Area Network
MANIAC  * Mathematical Analyzer Numerical
          Integrator and Computer
MANPAGE   Manual Page [Unix]
MAP       Maintenance Analysis Procedures +
          Manufacturing Automation Protocol +
          Memory Allocation Map
.MAP      Linker Map (file name extension)
MAPI      Mail/Messaging Applications Programming
          Interface [Microsoft]
MAPICS    Manufacturing, Accounting and Production
          Information Control System [IBM]
MARC      Machine Readable Cataloging +
          Multi-Technology Automated Reader Card
MARVEL    Machine-Assisted Realization of the Virtual
          Electronic Library [Library of Congress]
MASM      Macro Assembler [Microsoft]
MASS      Maximum Availability and Support
          Subsystem [Parallan]
MAT       Maintenance Access Terminal
MAU       Media Access/Adapter Unit + Multistation Access Unit
MAVDM     Multiple Application VDM
MAX       Maximum
MB        Megabyte (1,024 kilobytes) +
          Middle Button (of 3 button Mouse)
MBASIC    Microsoft BASIC [Microsoft]
MBCS      Multi-Byte Character Set [IBM]
MBONE     Multicast Backbone [Internet]
MBps      Megabytes Per Second
Mbps      Megabits Per Second
MBR       Master Boot Record
MBX       Mailbox
MCA       Micro Channel Adapter/Architecture [IBM]
MCAD      Mechanical Computer Aided Design
MCB       Memory Control Block
MCF       Meta Content Framework +
	  Microsoft Connector Framework [Microsoft]
MCGA      Multicolor Graphics Array
MCH	  Memory Controller Hub [Intel]
MCI       MCI Communications Corp. (name from initials of
          original company - Microwave Communications, Inc.) +
          Media Control Interface [Microsoft]
MCL       Microsoft Compatibility Labs [Microsoft]
MCM       Multi-Chip Module
MCNE      Master Certified Novell Engineer [Novell]
MC-PGA    Metallized Ceramic - Pin Grid Array
MCPS      Microsoft Certified Product Specialist [Microsoft]
MC-QFP    Metallized Ceramic - Quad Flat Pack
MCR       Modem Control Register
MCSD      Microsoft Certified Systems Developer [Microsoft]
MCSE      Microsoft Certified Systems Engineer [Microsoft]
MCU       Microcontroller Unit + Multi-Chip Unit [DEC] +
          Multipoint Control Unit
MD        Make Directory + Mini Disk [Sony] + Monochrome Display
MDA       Mail Delivery Agent + Model Drive Architecture +
          Monochrome Display Adapter + Multidimensional Analysis
MDDBMS    Multidimensional Data Base Management System
.MDF      Menu Definition File (file name extension)
MDI       Memory Display Interface +
          Multiple Document Interface
MDIC      Manchester Decoder and Interface Chip [AT&T]
MDK       Multimedia Developers Kit [Microsoft]
MDLP      Mobile Data Link Protocol
MDR       Metadata Repository + Minimum Design Requirement
MDX	  Multi-Dimensional Expressions
MDY       Month Day Year
.ME       Opening Information (file name extension) (As in READ.ME)
MEB       Memory Expansion Board
MED	  Minimum Expected Delay
MEG       Megabyte
MEM       Memory
MEMS	  Micro-Electro-Mechanical System
.MEN      Menu (file name extension)
MERCI     Multimedia European Research Conferencing Integration
MES       Manufacturing Execution System
MESI      Modified, Exclusive, Shared and Invalid (protocol)
MET       Memory Enhancement Technology [Hewlett-Packard]
.MET      Metafile (file name extension)
MFC       Microsoft Foundation Class [Microsoft]
MFFS      Microsoft Flash File System [Microsoft]
MFI       Multifunction Interpreter
MFIOP     Multifunction I/O Processor
MFLOPS    Million Floating Point Operations Per Second
MFM       Modified Frequency Modulation
MFP       Multi-Function Peripheral/Printer/Product
MFPI      Multifunction Peripheral Interface
MFS       Macintosh File System [Macintosh] +
          Magnetic Tape Field Search + Memory File System
          Modified Filing System [Revelation Technologies]
MFT       Master File Table +
          Multiprogramming with a Fixed number of Tasks
MGA       Monochrome Graphics Adapter
MGCP      Media Gateway Control Protocol
MGE       Modular GIS Environment
MGET      Multiple Get [Unix]
MGML      Minimal Generalized Markup Language
MGR       Manager
MHS       Message Handling Service + Message Handling System
MHz       Megahertz
MI        Management Interface
MIB       Management Information Base
MIC       Message Integrity Check
MICR      Magnetic Ink Character Recognition
MICRO     One-millionth
MICS      Macro Interpretive Commands
MID	  Mobile Information Device
MIDI      Musical Instrument Digital Interface
MIDP	  Mobile Information Device Profile
MIF       Management Information Format
.MIF      Management Information Files (file name extension)
MIG       Metal In Gap
MII       Microsoft/IBM/Intel
MIL       Machine Interface Layer [Go Corporation] +
.MIL      Military (Domain name) [Internet]
MIM       Map Image Metafile + Metal-Insulator-Metal (screen)
MIMD      Multiple Instruction Multiple Data Stream (processor)
MIME	  Multimedia Internet Message Extensions +
          Multipurpose Internet Mail Extensions
MI/MIC    Mode Indicate/Mode Indicate Common
MIN       Minimum + Mobile Identification Number
MIND      Microsoft Internet Developer [Microsoft]
MINUET    Minnesota Internet Users Essential Tools [Internet]
MIPS      Million Instructions Per Second
MIR	  Music Information Retrieval
MIRAM	  Magnetoresistive Random Access Memory
MIS       Management Information System +
          Multimedia Information Sources [Internet]
MISC      Miscellaneous
MIX       Member Information Exchange
.MIX	  Microsoft Picture It! (format)
MKDIR     Make Directory
ML        Machine Language + Meta Language
MLAPI     Multilingual Application Programming Interface
MLC       Multilayer Ceramic +
          Multilevel Cell (program) [Internet]
MLE       Multi-Line Editor
MLID      Multi-Link Interface Driver
MLM       Mailing List Manager [Internet]
MLP	  Meridian Lossless Packing
MLPPP     Multilink PPP
MM        Minutes + Month
MMA       Microcomputer Managers Association
MMC       Matched Memory Cycle + Microcomputer Marketing Council +
          Microsoft Management Console [Microsoft]
MMCD      MultiMedia Compact Disk
MMCX      Multimedia Communication Exchange [Lucent Technologies]
MMDS	  Multi-channel Multipoint Distribution Service
MMF	  Multi Mode Fiber (cable)
MMI       Man-Machine Interface
MMIS      Materials Manager Information System
MMPM      Multi Media Presentation Manager
MMS	  Multimedia Messaging Service
MMU       Memory Management Unit
MMVF      Multimedia Video File [NEC]
MMX       Matrix Manipulation Extensions [Intel] +
          Multimedia Extensions
MNOS      Metal Nitride Oxide Semiconductor
MNP       Microcom Networking Protocol [Microcom]
.MNU      Menu (fine name extension)
MO        Magneto-Optical (disk drive)
MOB       Memory-Order Buffer
MOBO      Mother Board
MOD       Module + Modulus
MODEM     Modulator Demodulator
MOHLL     Machine Oriented High Level Language
MOLAP     Multidimensional On-Line Analytical Processing
MOM       Manufacturing Operations Management +
          Message-Oriented Middleware +
          Microsoft Office/Operations Manager [Microsoft]
MONET     Multiwavelength Optical Networking
MONO      Monaural
MOO       MUD, Object Oriented [Internet]
MOP       Maintenance Operations Protocol
MOPS      Million Operations Per Second
MOS       Magneto-Optic Storage + Mean Opinion Score +
          Metal Oxide Semiconductor
MOSFET    Metal Oxide Semiconductor Field Effect Transistor
MOSPF	  Multicast Open Shortest Path First
MOTD      Message Of The Day
MOV       Metal Oxide Varistor + Move
MOVS      Move String
MP        Massively Parallel (processing) + Multiple Processors
MP3       MPEG Audio Layer 3
.MPA	  Memo Pad Archive (file name extension) [Palm]
MPC       Multimedia Personal Computer + Multipath Channel
MPCS      Mission Planning and Control Station (Software)
MPE       Multiple Programming Executive [HP]
MPEG      Moving Picture Experts Group
MPI       Message Passing Interface + Multiprecision Integer
MPLS	  Multi Protocol Label Switching [Cisco]
MPM       Message Passing Library [IBM]
MPMD      Multiple Processor/Multiple Data
MPOA      Multi-Protocol over Asynchronous-Transfer-Mode
MPP       Massively Parallel Processing/Processors +
          Message Posting Protocol + Message Processing Program
MPQP      Multi-Protocol Quad Port [IBM]
MPR       Multipart Repeater + Multi Protocol Router [Novell]
MPS       Multiprocessor Specification
MPTN      Multi-Protocol Transport Network
MPTS      Multi-Protocol Transport Services
MPU       Microprocessor Unit
MQI       Messaging and Queuing Interface [IBM]
MR        Magneto Resistive + Modem Ready
MRAM	  Magnetic Random Access Memory
MRCF      Microsoft Realtime Compression Format
MRCI      Microsoft Realtime Compression Interface
MRI       Magnetic Resonance Imaging
MRM       Most Recently-Used Master
MRO       Multi-Region Operation
MRP       Manufacturing Resources Planning +
	  Materials Requirement Planning
MRPL      Main Ring Path Length
MRS       Media Recognition System
MRT       Mean Repair Time
MRU       Maximum Receive Unit + Most Recently Used
MS        Memory System + Message Store + Microsecond +
          Microsoft Corporation + Millisecond
MSACM     Microsoft Audio Compression Manager [Microsoft]
MSAU      Multi-Station Access Unit
MSAV      Microsoft Anti Virus [Microsoft]
MSB       Most Significant Bit
MSBF      Mean Swaps Between Failures
MSC	  Mobile Switching Center
MSCDEX    Microsoft Compact Disc Extensions [Microsoft]
MSCE	  Microsoft Certified Software Engineer [Microsoft]
MSCHAP    Microsoft Challenge Handshake Authentication
          Protocol [Microsoft]
MSCS	  Microsoft Cluster Server [Microsoft]
MSD       Mass Storage Device + Most Significant Digit +
          Microsoft System Diagnostics [Microsoft]
MSDE      Microsoft Data Engine [Microsoft1)
MSDN      Microsoft Developer Network [Microsoft]
MS-DOS    Microsoft - Disk Operating System [Microsoft]
MSDR      Multiplexed Streaming Data Request
MSDS      Microsoft Developer Support [Microsoft]
MSFR      Minimum Security Function Requirements [IBM]
MSG       Message
.MSG      Program Message (file name extension)
MSGINA	  Microsoft Graphical Identification and Authentication
	  [Microsoft]
MSI       Medium Scale Integration
MSIE      Microsoft Internet Explorer [Microsoft]
MSIMN	  Microsoft Internet Mail and News [Microsoft]
MSL       Map Specification Library + Mirrored Server Link
MSMQ      Microsoft Message Queue-Server [Microsoft]
MSN       Microsoft Network [Microsoft]
MSO       Multiple Service/Systems Operator
.MSP      Microsoft Paint (file name extension) [Microsoft]
MSQL	  Mini SQL
MSR	  Microsoft Reserved Partition [Microsoft]
MSRP      Manufacturer Suggested Retail Price
MSS       Mass Storage System +
          Multiprotocol Switched Services [IBM]
MSTS      Microsoft Terminal Server [Microsoft]
MSW       Machine Status Word
MSXML	  Microsoft XML [Microsoft]
MTA       Mail Transport Agent + Message Transfer Agent +
	  Multimedia Terminal Adapter + Multiple Terminal Access
MTBB      Mean Time Between Breakdowns
MTBF      Mean Time Between Failures
MTBJ      Mean Time Between Jams
MTF       Microsoft Tape Format [Microsoft] +
          Modulation Transfer Function
MTH	  Memory Translator Hub
MTRP      Maximum Transfer Rate Performance
MTS       Message Transfer Service/System +
          Microsoft Transaction Server [Microsoft] +
          Multichannel Television Sound
MTSO	  Mobile Telephone Switching Office
MTST      Magnetic Tape Selectric Typewriter [IBM]
MTT       Multi-Transaction Timer
MTTD      Mean Time To Diagnose
MTTF      Mean Time To Failure
MTTR      Mean Time To Repair
MTU       Maximum Transfer/Transmission Unit
MUA       Mail User Agent
MUD       Multi-User Dialogue/Dimension/Domain/Dungeon [Internet]
MUG	  Multiuser Game
MUL       Multiply
MULTICS   Multiplexed Information and Computing Service
MUMPS     Massachusetts General Hospital Utility
          Multi-Programming System (Programming Language)
MUSE      Multi-User Shared Environment
.MUSEUM   Museums (Domain Name) [Internet]
MUSIC	  Multiparty Multimedia Session Control
MUT       Monitor Under Test
MUX       Multiplexer
mV        Millivolt
MVB       Multimedia Viewer Book
MVC       Multimedia Viewer Compiler
MVD	  Multivalued Dependencies
MVDM      Multiple Virtual DOS Machines
MVGA      Monochrome Video Graphics Array
MVIP      Multi-Vendor Integration Protocol
MVP       Multimedia Video Processor
MVS       Multiple Virtual Storage
MVT       Multiprogramming with a Variable number of Tasks
MX        Mail Exchanger [Internet]
MXS       Microsoft Exchange Server [Microsoft]
MZR       Multiple Zone Recording

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NAC       Network Adapter Card
NACD      National Association of Computer Dealers
NACS      National Advisory Committee on Semiconductors
NAE       Not Above or Equal
NAK       Negative Acknowledgment
NAKA	  Not Acknowledge
NAL	  Novell Application Launcher [Novell]
NAM       Number Assignment Module
.NAME     Names-Individuals (Domain Name) [Internet]
NAMPS     Narrow-Band Analog Mobile Phone Service [Motorola]
NAND      Not And
NANO      One thousand-millionth
NANOMETER One billionith of a meter
NAP       Network Access Point
NAPLPS    North American Presentation Level Protocol
          Syntax (graphics)
NAS       Network Access Server + Network Application Support [DEC] +
          Network Attached Storage
NASA      National Aeronautics and Space Administration
NASDAQ    National Association of Securities Dealers
          Automatic Quotation
NASI      NetWare Asynchronous Services Interface [Novell]
NASIRC    NASA Automated Systems Internet Response Capability
NASKER    NASA Ames Kernel (benchmark)
NAT       Network Address Transformation/Translators
NAU       Network Addressable Unit
NAV	  Navigator
NAVSTAR	  Navigation Satellite Timing and Ranging
NAWS      Negotiate About Window Size
NBE       Not Below or Equal
NBI       Nothing But Initials
NBMA      Non-Broadcast Multi Access
NBS       Narrowband Socket + National Bureau of Standards +
          Numeric Backspace
NC        Network Computer + No Carry + Numerical Control
NCA       Network Communications Adapter +
          Network Computing Architecture [Oracle]
NCC       Network Control Center
NCD       Network Computing Device
.NCF      Netware Command File [Novell]
NCGA      National Computer Graphics Association
NCIC      National Crime Information Center
NCMT    * Numerical Control for Machine Tools
NCOS      Network Computer Operating System
NCP       NetWare Core Protocol + Not Copy Protected +
          Network Control Panel/Processor/Program/Protocol
NCR       National Cash Register (Company)
NCSA      National Center for Supercomputing Applications
NCSC      National Computer Security Center
NCSI      Network Communications Services
          Interface [Network Products Corp.]
NDB       Non-Directional Beacon
NDDK      Network Device Development Kid [Microsoft]
NDEF      Not to be Defined
NDIS      Network Device/Driver Interface Specification
NDL       Network Data Language
NDMP      Network Data Management Protocol
NDN       Non-Delivery Notice
NDP       Numeric Data Processor
NDR       Network Data Representation
NDRO      Non-Destructive Read Out
NDS       NetWare Directory Service [Novell]
.NDX      Index (file name extension)
NEC       Nippon Electric Company
NED       NASA Extragalactic Database [NASA]
NEG       Negative + Negate
NEMA      National Electrical Manufacturers Association
NEP       Network Entry Point
NES       National Education Supercomputer
NEST      Novell Embedded Systems Technology [Novell]
.NET      Networks (Domain Name) [Internet]
NetBIOS   Network Basic Input/Output System [IBM]
NetBEUI   NetBIOS Extended User Interface [IBM]
NETMON    Network Monitor
.NEW      New Information (file name extension)
NEWS      NetWare Early Warning System [Frye Computer] +
          Network Extensible Window System
NEWS.     Current events [USENET Newsgroup Category]
NEXT      Near-End Crosstalk
NFF       No Fault Found
NFS       Network File System [Sun]
NG        No Good
NGE       Not Greater or Equal
NGI       Next-Generation Internet
NHC       National Hurricane Center
NHR       National Handwriting Recognition
NHRP      Next Hop Resolution Protocol
N/I       Non-Interlaced
NIA       Next Instruction Address
NIC       Network Information Center [Internet] +
          Network Interface Card +
          Numeric Intensive Computing
NICAD     Nickel-Cadmium
NICOLAS   Network Information Center OnLine Aid System [NASA]
NID       New Interactive Display [NEC] + Next ID
NIDS	  Network Intrusion Detection System [Unisys]
NII       National Information Infrastructure
NIM       Network Installation Management [IBM]
NIMH      (NiMH) Nickel-Metal Hydride
NIO       Native Input/Output + New Input/Output
NIPS      Network I/Os Per Second
NIR       Network Information Retrieval
NIS       Network Information Service [Unix]
N-ISDN    Narrowband ISDN + National ISDN
NISO      National Information Standards Organization
NISP      Networked Information Services Project
NIST      National Institute for Standards and Technology
NITC      National Information Technology Center
NIU       Network Interface Unit
NJE       Network Job Entry (protocol) [IBM]
NL        New Line
NLB	  Network Load Balancing [Microsoft]
NLE       Not Less or Equal
NLM       NetWare Loadable Module [Netware]
NLP       Natural-Language Processing
NLQ       Near Letter Quality
NLSFUNC   National Language Support Function
NLV       National Language Version [IBM]
NMI       Non-Maskable Interrupt
NMM       NetWare Management Map [NetWare]
NMOS      Negative Channel Metal-Oxide Semiconductor
NMP       Network Management Protocol [AT&T]
NMS       Network Management System [Novell]
NN        Network Node + No News [Internet]
NNI       Network to Network Interface
NNM       Network Node Manager
NNTP      Network News Transfer Protocol [Internet]
NOC       Network Operations Center
.NOM      Individual with Personal Site (Domain Name) [Internet]
NOP       No Operation
NOPAC     Network OPAC
NOR       Not Or
NOS       Network Operating System
NPA       Network Printer Alliance + Numbering Plan Area
NPI       Network Printer Interface
NPL       Nonprocedural Language
NPN	  Negative Positive Negative (bipolar transistor)
NPS       Novell Productivity Specialist [Novell]
NPT       Non-Programmable Terminal
NPTN      National Public Telecomputing Network
NPU       Natural Processing Unit
NPX       Numeric Processor Extension
NQS       Network Queuing System [Cray]
N(r)	  Number Returned
NRC       National Research Council (Canada)
NREN      National Research and Education Network
NRM       Network Resource Manager + Normal Response Mode
NRZ       Not Return to Zero
NRZI      Non Return to Zero Inverted
NS        Nanosecond (one-billionth of a second) +
          National Semiconductor (as in Ns16550 UART) +
          Network Supervisor + Non Stop
NSAP      Network Service Access Point
NSAPI     Netscape Server API [Netscape]
NSA POLY  National Security Agency Polygraph
NSERC     National Sciences and Engineering Research Council
          (Canada)
NSF       National Science Foundation
NSFNET    National Science Foundation Network
NSI       NASA Science Internet
NSLOOKUP  Name Server Lookup [Unix]
NSM       Netscape Server Manager [Netscape]
NSP       Native Signal Processing [Intel] + Network Service
          Provider
NSSC      NASA Standard Spacecraft Computer
NSTC      National Science and Technology Council
NSTL      National Software Testing Labs
NT        New Technology [Microsoft]
NT-1      Network Terminator Type 1
NTAS      NT Advanced Server [Microsoft]
NTF       No Trouble Found
NTFS      New Technology File System [Microsoft]
NTIA      National Telecommunications and
          Information Administration
NTIS      National Technical Information Service
NTP       Network Time Protocol
NTRAS     NT Remote Access Services [Microsoft]
NTSA      NetWare Telephony Services Architecture [Novell]
NTSC      National Television Standards Committee
NTU       Network Termination Unit
NUI       Network User Identification +
          Network User Interface +
          Notebook User Interface [Go Corporation]
NUL       Null + (dummy device) + (no device)
NUMA      Non-Uniform Memory Access
NV        No Overflow
NVM       Non-Volatile Memory
NVOD      Near-Video On Demand
NVP       Nominal Velocity of Propagation
NVRAM     Non-Volatile Random Access Memory
NVT       Network Virtual Terminal +
          Novell Virtual Terminal [Novell]
NWS       NetWare Web Server [Netware]
NYM       Anonymous

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OAB       One-to-All Broadcast
OAD       Open Architecture Driver [Bernoulli]
OAG       Official Airline Guide + Online Air Guide
OAI       Open Applications Interface
OAS       One-to-All Scatter
OBD       On Board Diagnostics
OBEX      Object Exchange [Borland]
OBJ       Object
OC        Optical Carrier
OCE       Open Collaborative Environment [Apple]
OCF       Objects Components Framework [Borland]
OCL       Object Constaint Language + Operation Control Language + 
	  Operator Control Language
OCR       Optical Character Recognition
OCS       On-Card Sequencer
OCSP	  Online Certificate Status Protocol
OCX       OLE Custom Control
ODA       Open Document Architecture
ODAPI     Open Database Application Programming
          Interface [Borland]
ODBC      Object-Oriented Database Connectivity +
	  Open Database Computing +
          Open Data Base Connectivity [Microsoft]
ODBMS     Object-Oriented Database Management System  (also
          see OODMS)
ODI       Open Datalink Interface [Novell] +
          Open Device Interconnect [NetWare]
ODIF      Open Document Interchange Format
ODL       Object Definition Language
ODM       Object Data Manager [IBM] +
          Optimized Distribution Model [Compaq]
ODMA      Open Document Management API
ODP       Open Distributed Processing
ODS       Open Data Services [Microsoft] +
          Operational Data Store
ODSI      Open Directory Service Interface [Microsoft]
ODT       Open Desktop
OEM       Original Equipment Manufacturer
OEP       Operand Execution Pipeline
OF        Overflow Flag
OFB       Output Feedback (mode)
OFDM      Orthogonal Frequency Division Multiplexing
OFMT      Output Format for Numbers
OFS       Object File System [Microsoft] + Output Field Separator
OFX       Open Financial Exchange
OGSA	  Open Grid Services Architecture
OGSI	  Open Grid Services Infrastructure
OH        Off Hook
OHCI      Open Host Controller Interface
OID	  Object Identifier
OIDL      Object Interface Definition Language
OIS       Office Information System
OLAP      Online Analytical Processing
OLCP      Online Complex Processing
.OLD      Old version (file name extension)
OLE       Object Linking and Embedding [Microsoft]
OLED	  Organic Light Emitting Diode
OLGA      Online Guitar Archive
OLI       Optical Line Interface [AT&T]
OLMC      Output Logic Macrocell
OLSP      Online Service Provider
OLTP      Online Transaction Processing
OM        Object Manager
OMA       Object Management Architecture [Microsoft]
OME       Open Messaging Environment (protocol)
OMF       Object Module Format [Microsoft] +
          Open Media Framework + Open Message Format
OMG       Object Management Group
OMI       Open Messaging Interface [Lotus]
OML       Object Manipulation Language
OMR       Optical Mark Recognition
ONC       Open Network Computing [Sun]
ONDS      Open Network Distribution Services [IBM]
ONE       Open Network Environment [Netscape]
ONMS      Open Network Management System
ONU       Optical Network Unit
OOAD	  Object-Oriented Analysis and Design
OOB       Out Of Band
OODB      Object-Oriented Database
OODMS     Object-Oriented Database Management System (also
          see ODBMS)
OOL       Object-Oriented Language
OOOS      Object-Oriented Operating System
OOPL      Object-Oriented Programming Language
OOPS      Object Oriented Programming and Systems
OOS       Object-Oriented Systems +
          Off-line Operating Simulator
OOT       Object-Oriented Technology
OOUI      Object Oriented User Interface
OP        Operation + Optical + Output
OPAC      Online Public Access Catalog [Internet]
OPC       Open Process Control + Organic/Optical Photoconductor
OPCODE    Operational Code
OPD       Operand
OPI       Open Prepress Interface
OPM       Operations Per Minute
OPS       Open Profiling Standard + Oracle Parallel Server [Oracle]
OPT       Open Protocol Technology
.OPT      Options (file name extension)
OPUS      Octal Program Updating System
OQL       Object Query Language
ORACLE    On-Line Inquiry and Report Generator (UNIX DB program)
ORB       Object Request Broker [Microsoft]
ORDVAC  * Ordnance Variable Automatic Computer
.ORG      Non-Profit Organizations (Domain name) [Internet]
ORI       Online Retrieval Interface
.ORI      Original (file name extension)
ORL	  Optical Return Loss
OROM      Optical Read-Only Memory
ORS       Output Record Separator
OS        Operating System
OS/2      Operating System/2 [IBM]
OSA       Open Scripting/System Architecture
OSCAR	  Open Source Cluster Application Resources
OSD	  On Screen Display +
          Open Software Description/Distribution
OSE       Office Server Extensions [Microsoft]
OS/E      Operating System/Environment
OSF       Open Software Foundation
OSI       Open Systems Interconnection
OSM       Off-Screen Model
OSP       On-Screen Programming + Optical Storage Processor
OSPF      Open Shortest Path First
OSQL      Object Structured Query Language
OSR2      OEM Service Release 2 [Microsoft]
OSS       Open Source Software
OT        Object Technology
OTA       Operation-Triggered Architecture + Over The Air
OTDR      Optical Time Domain Reflectometer
OTF       Open Token Foundation
OTI	  Object Technology International [IBM]
OTP       One-Time Programmable
OUI       Organizational Unique Identifier
OURS      Open Users Recommended Solutions
.OUT      Outlines (file name extension)
OUTS      Output String
OV        Overflow
OVAL      Object-Based Virtual Application Language [Psion] +
	  Open Vulnerability Assessment Language [US-CERT]
.OVL      Program Overlay (file name extension)
.OVR      Program Overlay (file name extension)
OWL       Object/Open Windows Library [Borland]

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P3P       Platform for Privacy Preferences Project
PAB       Personal Address Book
PABX      Private Automatic Branch Exchange
PACE      Priority Access Control Enabled [3Com]
PACS      Picture Archiving and Communication System
PACS-L    Public Access Computer Systems List [Internet]
PAD       Packet Assembler/Disassembler +
	  Portable Application Description
PADS      Pen Application Development System [Slate Corporation]
PAIH      Public-Access Internet Host [Internet]
PAIS      Public-Access Internet Site [Internet]
.PAK      Packed (compressed file name extension) [NoGate
          Consulting]
PAL       Paradox Applications Language [Borland] +
          Phase Alternating Line + Programmed Array Logic +
          Programming Assembly Language
.PAL      Palette (file name extension)
PALC      Plasma-Addressed Liquid Crystal (display)
PALS      Principles of the Alphabet Literacy System
PAM	  Pluggable Authentication Module (library) +
          Pulse Amplitude Modulation
PAN       Personal Area Network [GTE]
PAP       Packet-level Procedure +
          Password Authentication Protocol +
          Push Access Protocol + Printer Access Protocol
PAR       Personal Animation Recorder + Parallel
PARA      Paragraph
PARC      Palo Alto Research Center [XEROX]
PA-RISC   Precision Architecture-RISC [HP]
.PAS      PASCAL source code (file name extension)
PASCAL    (Programming Language named for Blaise Pascal)
PAT	  Port Address Translation
.PAT      Patch + Pattern (file name extensions)
PATA	  Parallel Advanced Technology Attachment
PATN      Promotional Port Access Telephone Number
PAUSE	  Perl Automatic Upload Server
PAX       Portable Archive Exchange [Unix]
PB        Petabyte (1,024 terabytes)
          (One Million Billion characters of information)
PBA       Printed Board Assembly
PBC	  Plain-Text Block Chaining
PBE       Prompt By Example
PBGA      Plastic Ball Grid Array
PBR	  Policy-Based Routing [Cisco]
PBX       Private Branch Exchange
PC        Personal Computer + Printed Circuit + Program Counter
PCACIAS   Personal Computer Automated Calibration Interval
          Analysis System
PCB       Printed Circuit Board + Program Control Block
PCBC      Plain/Propagating Cipher Block Chaining
PCC	  Proof Carrying Code
PCD       Photo Compact Disk
PC-DOS    Personal Computer - Disk Operating System [IBM]
PCEB      PCI to EISA Bridge [Intel]
PCI       Peripheral Component Interconnect/Interface
PCIC      PC-Card Interrupt Controller
PC-I/O    Program Controlled I/O
PCL       Printer Command Language [HP] + Process Control Language
PCM       Personal Computer Manufacturer +
          Printer Cartridge Metric [HP] +
          Pulse Code Modulation
PCMA      Paired Carrier Multiple Access
PCMC      PCI, Cache, Memory Controller [Intel]
PCMCIA    Personal Computer Memory Card International Association
PCMIM     Personal Computer Media Interface Module
PCN       Personal Computer Network
PCNFS     Personal Computer Network File System
PCO       Point of Control and Observation
PCS       Patchable Control Store +
          Personal Communication Services/System +
          Personal Conferencing Specification +
          Planning Control Sheet + Print Contrast Signal +
          Process Control Systems + Program Counter Store +
          Project Control System
PCT       Private Communications Technology +
	  Program Control Table
.PCT      Picture (file name extension)
.PCX      Picture Image (file name extension)
PD        Phase-Change Dual + Public Domain
PDA       Personal Digital Assistant
.PDB      Palm Database (file name extension) +
	  Program Database (file name extension)
PDC       Primary Domain Controller
PDD       Physical Device Driver + Portable Digital Document
PDF       Package Definition File + Portable Document Format +
          Portable Document File + Processor Defined Function +
          Program Development Facility
.PDF      Printer Description (file name extension)[Borland,Lotus]
PDH       Plesiosynchronous Digital Hierarchy
PDIAL     Public Dialup Internet Access List [Internet]
PDL       Page Description Language + Program Description Language
          + Program Design Language
PDM       Product Data Management
PDN       Public Data Network
PDO       Portable Distributed Objects [Next]
PDP       Parallel Data Processing + Plasma Display Panel +
          Programmable Data Processor +
          (DEC Computer System Designation, i.e. PDP-8, PDP-11)
PDS       Packet Driver Specification + Partitioned Data Set +
          Planetary Data System + Portable Document Software +
          Processor Direct Slot [Macintosh]
PDSN	  Packet Data Serving Node
PDSS      Post Development and Software Support
PDT       Performance Diagnostic Tool [IBM] +
          Programmable Drive Table
PDU       Plug Distribution Unit + Protocol Data Unit
.PDX      Paradox files (file name extension) [Borland] +
          Printer Description Extension (file name extension)
PE        Parity Even + Processing Element + Protect Enable
PEA       Pocket Ethernet Adapter
PEB	  Personal Electronic Ballot
P4EE	  Pentium 4 Extreme Edition [Intel]
PEL       Picture Element [IBM]
PEM       Privacy-Enhanced Mail [Internet]
PEN SDK   Pen Computing Software Development Kit
PEP       Packet Exchange Protocol +
          Packetized Ensemble Protocol [Telebit]
PERC      Power Edge RAID Controller
PERL      Practical Extraction and Report Language [Unix]
PERT      Program Evaluation and Review Technique
PES       Positioning Error Signal + Processor Enhancement Socket
          Processor Upgrade Socket
PET       Print Enhancement Technology [Compaq]
.PFB      Printer Font Binary (file name extension)
PFE       Programmer's File Editor
.PFM      Printer Font Metrics (file name extension) [Windows]
PFN       Page Frame Number
PFR       Portable Font Resource + Power-Fail Restart
PGA       Pin Grid Array + Professional Graphics Adapter [IBM]
PGC       Program Group Control [Microsoft]
PGDN      Page Down
.PGL      Graphics (file name extension) [Hewlett-Packard]
PGM       Program
PGML      Precision Graphics Markup Language
PGP       Pretty Good Privacy (name of encryption program)
.PGP      ProGram Parameter (file name extension) [AutoCAD]
PGUP      Page Up
PHF	  Perfect Hash Function
PHIGS     Programmers' Hierarchical Interactive Graphics
          Standards
.PHO      Phone List (file name extension)
PHP	  Personal Home Pages (original name of this programming
	  language, now known as PHP Hypertext Preprocessor)
PHS       Personal Handyphone System
PI        Program Interruption
PIA       Peripheral Interface Adapter
PIC       Personal Information Carrier +
          Personal Intelligent Communicator +
	  Personal Internet Communicator +
          Platform for Internet Content +
          Priority Interrupt Controller +
          Program Interrupt Controller
PICS      Platform for Internet Content Selection [W3C]
PICT      Picture
PID       Packet Identifier + Physical Interface Device +
	  Process Identification Number + Product ID +
          Proportional, Integral, Derivative
PIER      Procedures for Internet/Enterprise Renumbering
PIF       Picture Interchange Format File +
          Program Information File
PII       Program Integrated Information
PILOT     Programmed Inquiry Learning Or Teaching
PilotACE* Pilot Automatic Computing Engine
PIM       Personal Information Manager +
          Primary Interface Module +
          Protocol-Independent Multicast
PIN       Personal Identification Number +
          Process Identification Number [Unix]
PINE      Pine Is Not Elm (original usage) +
          Program for Internet News & Email (present usage)
PING      Packet Internet Groper
PIO       Parallel Input/Output + Processor Input/Output +
          Programmed Input/Output
PIP       Pattern and Information Processing +
          Picture-In-Picture + Problem Isolation Procedure +
          Programmable Interconnect Point
PIPO      Parallel In, Parallel Out
PIR       Protocol Independent Routing
PIT       Programmable Interval Timer
PIXEL     Picture Element
PJPEG     Progressive JPEG
PK	  Primary Key
PKC       Public Key Cryptography
PKE	  Public Key Enabled
PKI	  Public Key Infrastructure
PL        Plus
.PL       Perl Language (file name extension)
PLA       Programmable Logic-Array
PLATO     Programmed Logic for Automatic Teaching Operations
PLC       Power Line Communications +
	  Programmable Logic Controller
PLCC      Plastic Leadless Chip Carrier
PLD       Programmable Logic Device
PLDS      Pilot Land Data System [NASA]
PLL       Phase Locked Loop
.PLL      Prelinked Library (file name extension) [Clipper]
PL/M      Programming Language for Micros
PLMN	  Public Land Mobile Network
PLS       Primary Link Station
PLSQL	  Procedural Language-Extensions to SQL (Oracle)
PLU	  Primary Logical Unit
PLV       Production Level Video
PL/1    * Programming Language One
PM        Presentation Manager [IBM] +
          Preventative Maintenance + Process Manager
.PM6	  PagerMaker6 (file name extension) [Corel]
P-MAIL    Paper Mail
PMD       Packet Mode Data
PMMU      Paged Memory Management Unit
PMOS      Positive Channel Metal Oxide Semiconductor
PMR       Problem Management Report [IBM]
PMS       Policy Management System
PN        Processing Node
P/N:      Part Number
PNA       Programmable Network Access
PNG       Portable Network Graphics
PNNI      Private Network-to-Network Interface
PNP       Plug And Play +
	  Positive Negative Positive (bipolar transistor)
PO        Parity Odd
POA	  Portable Object Adapter
POC       Point Of Contact
POC-IT	  Point Of Care-Information Technology [Johns Hopkins]
POD	  Piece Of Data + Plain Old Documentation [Perl] +
          Plain Old Dos + Publishing On Demand
POE       Power Open Environment
POH       Power-On Hours
POL       Problem Oriented Language
POP       Point Of Presence + Pop from Stack + Post Office Protocol
POP3      Post Office Protocol, Version 3
POPA      Pop All Registers
POPF      Pop Flags
POR       Power-On-Reset
POS	  Packet Over Sonet + Point of Sale + Positive +
	  Programmable Object Select
POSE	  Palm Operating System Emulator
POSIX     Portable Operating System Interface for Unix
POST      Power-On Self Test
POSTNET   Postal Numeric Encoding Technique (bar code)
POTS      Plain Old Telephone Service + Plain Old Time-Sharing
POWER     Performance Optimization with Enhanced RISC [IBM]
PowerPC   Performance Optimization with Enhanced RISC-Performance
          Computing
PP        Parallel Port
P2P	  Peer To Peer + People To People
P3P	  Platform for Privacy Preferences
PPA       Pixel Processing Accelerator
.PPD      PostScript Printer Description (file name extension)
PPDS      Personal Printer Data Stream [IBM]
PPGA      Plastic Pin Grid Array
PPI       Precise Pixel Interpolation
PPM       Pages Per Minute
PPML	  Personalized Print Markup Language
PPP       Point-to-Point Protocol [Internet]
PPPOE	  Point-to-Point Protocol Over Ethernet
PPS       Packets Per Second + Power Personal Systems [IBM]
.PPS	  PowerPoint Show (file name extension) [Microsoft]
PPTP      Point-to-Point Tunneling Protocol [Microsoft]
PQA       Palm Query Application
PQFP      Plastic Quad Flat Pack
PQO	  Parallel Query Option
PRACSA    Public Remote Access Computer Standards Association
PRAM      Parallel Random-Access Machine +
          Parameter Random Access Memory
.PRC      Pilot Resource (file name extension) [Palm Pilot]
.PRD      Printer Driver (file name extension) [Microsoft]
PRE       Preformatted [HTML]
PREP      Power PC Reference Platform [IBM/Motorola]
PRF       Pulse Repetition Frequency
.PRF      Preferences (file name extension) [Grammatik IV]
.PRG      Program (file name extension)
PRI       Primary-Rate Interface
PRINTF    Print with Formatting [C Programming Language]
PRISM     Photo-Refractive Information Storage Material
.PRJ      Project (file name extension) [Borland]
PRMD      Private Management Domain [X.400]
PRML      Partial-Response Maximum-Likelihood
.PRO      Professionals (Domain Name) [Internet] +
          Profile (file name extension)
PROC      Procedure
PROFS     Professional Office System [IBM]
PROG      Program + Programmer
PROLOG    Programming In Logic (Programming Language)(See HLL)
PROM      Programmable Read Only Memory
PRN       Printer
PRNG	  Pseudo-Random Number Generation (algorithm)
.PRS      Printer (file name extension) [WordPerfect]
PRTSC     Print Screen
PS        Proportional Spacing
.PS       PostScript (file name extension)
PS/2      Programming System 2 [IBM]
PSAPI     Presentation Space Application Programming Interface
PSC       Personal Super Computer + Print Server Command +
          Product Service Center
PSDN      Packet-Switched Data Network
PSDS      Packet-Switched Data Service
PSERVER   Print Server [NetWare]
PSF       Permanent Swap File
PSID      PostScript Image Data
PSINET    (formerly Performance Systems International)
PSK	  Phase Shift Keying
PSM       Platform Specific Model + Printing Systems Manager +
	  Print Services Facility [IBM]
PSN       Packet Switching Network +
          Processor Serial Number
PSP       Personal Software Products (group) [IBM] +
          Program Segment Prefix
PSPDN     Packet-Switched Public Data Network
PSRAM     Pseudo-Static Random Access Memory
PSRT      PostScript Round Table [GEnie]
PSS 	  Process Status Structure
PSTN      Public Switched Telephone Network
PSU       Power Supply Unit
PSW       Program Status Word
.ps.Z     Compressed PostScript (file name extension) [Unix]
PT        Page Table
P/T       Part Time
PTD       Parallel Transfer Disk Drive
PTE       Page Table Entry
PTF       Problem Temporary/Trouble Fix [IBM]
PTH	  Plated Through Hole
PTI       Packet Type Identifier
PTT       Postal Telephone & Telegraph
PUB       Public (directory) [Internet] + Publish
.PUB      Publication (file name extension) [Ventura]
PUN       Physical Unit Number
PUP       PARC Universal Packet (protocol)
PURL	  Persistent URL
PUS       Processor Upgrade Socket
PUSHA     Push All Registers
PUSHF     Push Flags
PVC       Permanent Virtual Circuit + Polyvinyl Chloride
PVM       Parallel Virtual Machine +
          Pass-through Virtual Machine (protocol) [IBM]
PVP       Parallel Vector Processing
PVR	  Personal Video Recorder
PVS       Parallel Visualization Server
PW        Password
PWB       Printed Wire Board +
          Programmer's Workbench [Microsoft]
PWD       Print Working Directory [Unix]
.PWL	  Password List (file name extension)
PWM	  Pulse Width Modulation
PWR       Power
PWSCS     Programmable Workstation Communication Services [IBM]
.PX       Primary Index (file name extension) [Paradox]

Q...

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QA        Quality Assurance
QAM       Quadrature Amplitude Modulation
QBE       Query By Example
QBF       Query by Form
QBIC      Query By Image Content [IBM]
QC        Quality Control
QD        Querty/Dvorak
QDA       Qualitative Data Analysis
QDOS      Quick and Dirty Operating System
.QDI      Quicken Dictionary (file name extension) [Intuit]
.QDT      Quicken Data (file name extension) [Intuit]
QEMM      Quarterdeck Expanded Memory Manager [Quarterdeck Corp.]
QFA       Quick File Access
QFE       Quick-Fix Engineering [Microsoft]
QFP       Quad Flat Pack
QIC       Quality Information Using Cycle Time [Hewlett-Packard] +
          Quarter-Inch Cartridge
.QIF      Quicken Import File/Interchange Format
          (file name extension)
QLLC	  Qualified Logical Link Control
.QMT      Quicken Memorized List (file name extension) [Intuit]
.QNX      Quicken Indexes to Data (file name extension) [Intuit]
QOS       Quality Of Service
QPG       Quantum Phase Gate
QPSK      Quadrature Phase Shift Keying
QSAM	  Queued Sequential Access Method
QTC       Quicktime Conferencing [Macintosh]
QTVR	  Quicktime Virtual Reality

R...

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RA        Remote Assistance + Return Authorization
.RA       Real Audio (file name extension)
RACF      Resource Access Control Facility
RAD       Rapid Application Development
RADAR     Radio Detection And Ranging +
          Rights, Availabilities, Distribution Analysis
          and Reporting [Disney]
RADB      Routing Arbiter Data Base
RADIUS    Remote Authentication Dial-In User Service
RADSL     Rate Adaptive Digital Subscriber Line
RAG       Row Address Generator
RAID      Redundant Arrays of Independent Disks +
          Redundant Arrays of Independent Drives +
          Redundant Arrays of Inexpensive Disks
RAIS      Redundant Arrays of Inexpensive Systems
RALU      Register Arithmetic Logic Unit
RAM       Random Access Memory
.RAM      Real Audio Metafile (file name extension)
RAMDAC    Random Access Memory Digital-to-Analog
          Converter [Sierra]
RAMP      Remote Access Maintenance Protocol [Internet]
RAN	  Radio Access Network + Regional Advanced Network
RAND      Random
RAP       Rapid Application Prototyping
RARP      Reverse Address Resolution Protocol
RAS       Random Access Storage +
          Reader Admission System [British Library] +
          Reliability, Availability and Serviceability +
          Remote Access Service + Row Address Select
RASAPI    Remote Access Service Application Programming
          Interface [Microsoft]
.RAT      Rating (file name extension)
RAVE      Rendering Acceleration Virtual Engine [Apple Computer]
.RAW      Raw Data (file name extension)
RB        Right Button (of 2 or 3 button Mouse)
RBBS      Remote Bulletin Board System
RBCS      Remote Bar Code System
RBOC      Regional Bell Operating Company
.RC       Resource (file name extension)
RC1	  Release Candidate 1 [Microsoft]
RCD	  Redistribution Control Descriptor
RCL       Rotate Carry Left
RCP       Remote Control Panel + Remote Copy [Internet] +
          Restore Cursor Position + Rich Client Platform
RCPT      Recipient
RCR       Rotate Carry Right
RCS       Records Communications Switching System +
          Revision Control System [Unix]
RD        Receive Data + Remove Directory
R&D       Research and Development
RDA       Remote Database Access
RDB       Receive Data Buffer + Relational Database
RDBMS     Relational Database Management System
RDCLK     Received Timing Clock
RDF       Resource Description Framework [W3C]
RDIF	  Radio Frequency Indentification (tag)
RDN	  Relative Distinguished Name
RDO       Remote Data Object
RDP       Reliable Datagram Protocol + Remote Desktop Protocol
RDR	  Remote Data Recovery
RDRAM     Rambus DRAM
RDSL	  (See DSL)
RDSR      Receiver Data Service Request
RDTO      Receive Data Transfer Offset [IBM]
RDX       Realistic Display Mixer
.REC      Recorder (file name extension) +
          Recreational or Entertainment Activities (Domain
          Name) [Internet]
REC.      Recreation [USENET Newsgroup Category]
.REF      Reference (file name extension)
REG       Register
REGAL     Rigid Epoxy Glass Acrylic Laminate
REGEDIT	  Registry Editor [Microsoft]
RELSECT   Relative Sector
REM       Remark + Remote + Ring Error Monitor
REN       Rename + Ringer Equivalence Number
REP       Repeat
REPE      Repeat while Equal
REPNE     Repeat while Not Equal
REPNZ     Repeat while Not Zero
REPZ      Repeat while Zero
REQ       Request
REREG     Re-Register
RES       Remote Execution Service + Reset + Resolution
.RES      Resource (file name extension)
RET       Resolution Enhancement Technology [HP] + Return
RETR      Retrieve
REX       Relocatable Executable
REXEC     Remote Execution
REXX      Restructured Extended Executor (language) [IBM]
RF        Radio Frequency
RFC       Request For Comments [Internet]
RFD       Request for Discussion [Internet]
RFI       Radio Frequency Interference + Request for Information
RFID      Radio Frequency Identification
RFP       Request for Proposal
RFQ       Request for Quotation
RFS       Remote File Sharing + Remote File System
RFT       Revisable Form Text + Rich Text Format
RFU       Reserved For Future Use
RGB       Red-Green-Blue (color model)
RI        Referential Integrity + Ring Indicate
 RID       Relative Identifier
RIFF      Resource Interchange File Format [Microsoft]
RIM       Remote Installation and Maintenance [Microsoft] +
	  Ring Indicator Monitor
RIME      RelayNet International Message Exchange
RIP       Raster Image Processor + Remote Imaging Protocol +
          Routing Information Protocol [Novell]
RIPEM     Riordan's Internet Privacy Enhanced Mail
RIPS      Raster Image Processing System
RISC      Reduced Instruction Set Computing
RIT       Raw Input Thread [Microsoft]
RJE       Remote Job Entry
RLD       Received Line Detect
RLE       Run Length Encoded
RLL       Run Length Limited
RLN       Remote LAN Node [DCA]
RLOGIN    Remote Login
RLSD      Received Line Signal Detected
RLSI    * Ridiculously Large-Scale Integration
RM        Reset Mode
RMA       Return Material Authorization +
          Return to Manufacturer Authorization
RMB       Right Mouse Button
RMC	  Raptor Management Console [Symantec]
RMDIR     Remove Directory
RMI       Remote Messaging Interface +
          Remote Method Invocation [Sun]
RMON      Remote Monitor/Monitoring
RMP       Remote Maintenance Processor [IBM]
RMS       Record Management Services + Root Mean Square
RMW       Read-Modify-Write
RN        Read News [Internet]
RNA       Remote Network Access [Microsoft]
RNC	  Radio Network Controller
RND       Random
RNG       Random Number Generator
RNP       Regional Network Provider
R-O       Read Only
ROB       Reorder Buffer [Intel]
ROI	  Return On Investment
ROL       Rotate Left
ROLAP     Relational On-Line Analytical Processing
ROM       Read Only Memory
ROOM      Real-Time Object-Oriented Modeling
ROP       Raster Operation + RISC Operation
ROPES	  Rapid Object-Oriented Process for 
	  Embedded Systems
ROR       Rotate Right
ROS       Read-Only Storage [IBM]
ROSCOE    Remote Operating System Conversational Online
          Environment
ROT       Running Object Table
RPC       Remote Procedure Call
RPE	  Remote Program Execution
RPG       Report Program Generator (Programming Language)
RPL       Resident Programming Language +
          Requested Privilege Level
RPN       Real Page Number + Reverse Polish Notation
RPRINTER  Remote Printer [NetWare]
RPPROM    Reprogrammable PROM
RPR       Relative Performance Rating
RPT       Repeat
RPQ       Request for Price Quotation
RQBE      Relational Query By Example [Fox Pro]
RR        Real Reality
RRP	  Recommended Retail Price
RS        Radio Shack +
          Recommended Standard (as in RS-232) [EIA] +
          Record Separator + Request to Send
RSA129    (129 digit cryptographic security number named after
          its inventors: Drs. Ronald L. Rivest, Adi Shamir and
          Leonard M. Adleman)
RSAC      Recreational Software Advisory Council
RSCS      Remote Spooling Communications System
RSD       Route Server Daemon
RSH       Remote Shell
RSI       Repetitive Strain Injury (Carpal Tunnel Syndrome)
RSL       Request-and-Status Link
RSP       Required Space Character + Response
RSPX      Remote Sequenced Packet Exchange
RSS	  Really Simple Syndication + Reduced Space Symbology +
	  RDF Site Summary + Rich Site Summary
RST       Reset + Restart
RSTS      Resource Sharing Time Sharing [Digital]
RSVP      Resource Reservation Protocol
RSX       Realistic Sound Experience +
          Real Time Resource Sharing Executive
RT        Real Time + RISC Technology + Run Time
R/T       Receive/Transmit
RTAM      Remote Terminal Access Method
RTC       Real-Time Clock
RTCP	  Real-Time Control Protocol
RTDM      Real-Time Data Migration
RTEL      Reverse Telnet [Internet]
RTF       Rich Text Format
RTI	  Run Time Infrastructure
RTL	  Raster Transfer Language +
          Register Transfer Language/Level +
          Resistor Transistor Logic + Right-To-Left +
          Run Time Library
RTM       Response Time Monitor + Runtime Manager [Borland]
RTMP      Routing Table Maintenance Protocol
RTN       Reuters Transaction Network
RTOS      Real-Time Operating System
RTP       Rapid Transport Protocol + Real Time Protocol +
	  Real-Time Transport Protocol
RTS       Remote Takeover System + Ready/Request To Send
RTSP      Real-Time Streaming Protocol
RTTI      Runtime Type Identification/Information
RTTY      Radio Teletypewriter (Communications)
RTV       Real Time Video
RTX       Run Time Extension
RUN       Rewind/Unload [IBM]
RVA       Relative Virtual Address
RVI       Reverse Interrupt
R/W       Read/Write
RWIN      Receive Window
RWM       Read-Write Memory
RX        Receiver
RXD       Receive Data

S...

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SA        Selective Availability
SAA       Systems Application Architecture [IBM]
SABRE     Semi-Automatic Business Research Environment
SAC       Single Attachment Concentrator
SACD	  Super Audio Compact Disk
SACL      System Access Control List
SADL      Synchronous Data Link Control [Racal-Vadic]
SAINT   * Symbolic Automatic Integrator
SAL       Shift Arithmetic Left + Spatial Aggregation Language +
	  Systen Abstraction Layer
SAM       Serial Access Memory + Sequential Access Method +
          Security Accounts Manager [Microsoft] +
          Single Application Mode [Microsoft]
SAML	  Security Assertion Markup Language
SAN       Storage/System Area Network
SANE      Standard Apple Numeric Environment
SAP       Second Audio Program + Service Access Point [DEC] +
          Session Announcement Protocol +
	  Service Advertising Protocol +
        * Symbolic Assembly Program +
          Systems, Applications and Products (company) [SAP]
SAPI      Speech Application Program Interface [Microsoft]
SAR       Segmentation and Reassembly +
          Shift Arithmetic Right + Specific Absorption Rate
          Successive Approximation Register +
          Synthetic Aperature Radar
SARG	  Search Argument
SARS	  Severe Acute Respiratory Syndrome (virus)
SAS       Sales Accounting System + Serial Attached SCSI +
          Single Attached Station + Single Audio System +
	  Statistical Analysis System
SASI      Shugart Associates System Interface (SCSI originated
          from SASI)
SATA	  Serial Advanced Technology Attachment
SATAN     Security Administrator Tool for Analyzing Networks
.SAV      Saved (file name extension)
SAVDM     Single Application VDM
SAX	  Simple API for XML
SB        Sound Blaster [Creative Labs] + Sound Board
SBA       Scene Balance Algorithms [Kodak] +
	  Service Based Architecture
SBAS	  Satellite Based Augmentation System
SBB       Subtract With Borrow
SBC       Single-Board Computer
SBCS      Single-Byte Character Set
SBI       Sound Blaster Instrument
.SBR      Source Browser (file name extension) [Borland]
SBS	  Small Business Server +
          Smart Battery Specification [Duracell/Intel]
.SC       Script (file name extension)
SCA	  Scalable Computing Architecture [HP]
SCADA     Supervisory Control and Data Acquisition
SCAM      SCSI Configuration Automatically
SCAS      Scan String
SCB       Subsystem Control Block [IBM]
SCC       Serial Communications Controllers +
          Serial Controller Chip +
          Synchronous Channel Check [IBM]
SCCP	  Simple Conference Control Protocol
SCCS      Source Code Control System
SCD       Standard Color Display
S-CDMA    Synchronous Code-Division Multiple Access
SCF       System Control Facility
SCI       Scalable Coherent Interface +
          Serial Communications Interface
SCI.      Science [USENET Newsgroup Category]
SCIL      Serial Control Interface Logic
SCLM      Software Configuration and Library Management [IBM]
SCM       Service Control Manager + ScreenCam Format [Lotus] +
          Software Configuration Management + Station Class Mark +
	  Supply Chain Management
SCO       Santa Cruz Operation (Software Company) +
	  Synchronous Connection-Oriented (link)
SCOPE     Simple Communications Programming Environment
          [Hayes]
SCP       Save Cursor Position + Subsystem Control Port +
          System Control Program
SCR       Silicon Controlled Rectifier
.SCR      Script (file name extension)
SCRAM	  Software Configuration, Release and Management
SCRAMJET  Supersonic Combustion Ramjet (engine)
SCRN      Screen (video display)
SCRS      Scalable Cluster of RISC Systems
SCSA      Signal Computing System Architecture [Dialogic]
SCSI      Small Computer Systems Interface
SCTP      Stream Control Transmission Protocol
SD        Send Data + Super Density
SDA       Software Delivery Agent [IBM] + Software Disk Array + 
	  Source Data Automation + System Display Architecture [Digital]
SDAM      Single DOS Application Mode
SDB       Symbolic Debugger [Unix]
SDD       Software Description Database [Internet] +
          Subscriber Data Document +
          System Distribution Directory
SDF       Space Delimited File + Space Delimited Format
.SDF      Standard Data Format (file name extension)
SDH       Synchronous Digital Hierarchy
SDI       Selective Dissemination of Information +
          Single Document Interface
          Software Development Interface [Mosaic]
SDK       Software Development Kit [Microsoft]
SDL       Specification and Description Language
SDLC      Synchronous Data Link Control (protocol)
SDLT	  Super Digital Linear Tape
SDM       System Development Multitasking
SDMI	  Secure Digital Music Initiative/Interface
SDMMC	  Secure Digital Multi Media Card
SDMS      SCSI Device Management System [NCR]
SDN       Software Defined Network [AT&T]
SDNS      Secure Data Network Service
SDR       Streaming Data Request
SDRAM     Synchronous DRAM
SD-ROM    Super Density ROM
SDS       Sysops Distribution System
SDSL      (See DSL)
SD_STB    Streaming Data Strobe [IBM]
SDTV      Standard Definition Television
SDV       Switched Digital Video [AT&T]
SDX       Storage Data Acceleration
SDXF	  Structured Data Exchange Format
SEA       Standard Extended Attribute [OS/2]
.SEA      Self Extracting Archive (file name extension) [Macintosh]
SEAC    * Name of first computer to use transistors, built by
          (National Bureau of) Standards Eastern Automatic
          Calculator (Also see SWAC)
SEAL      Segmentation and Reassembly Layer (protocol) +
          Screening External Access Link [Digital-DEC]
SEC       Single Error Correction
SECAM     Sequentiel Couleur Avec Memoire
          (Sequential Color With Memory)
SECC      Single Edge Contact Cartridge
SED       Stream Editor + Stream-Oriented Editor
SEG       Segment
SEH       Structured Exception Handling
SEL       Select
SEM       Scanning Electron Microscope +
          Standard Electronic Module +
          Strategic Enterprise Management [SAP]
SEO	  Search Engine Optimization
SEPP      Secure Encryption Payment Protocol
SER       Serial
SERCOS    Serial Real-Time Communications System
SERPS	  Search Engine Results Page [Google]
SET       Secure Electronic Transaction +
          Softwave Engineering Technology
.SET      Driver Set (file name extension) [Lotus 1-2-3] [LDC] +
          Image Settings (file name extension) [Paradox]
SETEXT    Structure Enhanced Text [Internet]
SEU       Single Event Upset + Smallest Executable Unit
SF        Sign Flag
SFC       System File Checker
SFD       Start Frame Delimiter
SFDR      Spurious-Free Dynamic Range
SFI	  Software Fault Isolation
SFN       Short File Name
SFQL      Structured Full-text Query Language
SFS       System File Server
SFT       System Fault Tolerance
SFX       Self Extracting + Sound Effect(s)
SGA       Shared Global Area
SGCP	  Simple Gateway Control Protocol
SGEN      Signal Generator + System Generator
SGDT      Store Global Descriptor Table
SGI       Silicon Graphics, Inc.
SGM       Shaded Graphics Modeling
SGML      Standard/Structured Generalized Markup Language
SGR       Set Graphics Rendition
SGRAM     Synchronous Graphics RAM
S/H       Sample and Hold
SHA       Secure Hash Algorithm [NSA]
SHAR      Shell Archive
SHED      Segmented Hypergraphic Editor
SHG       Segmented Hypergraphics
SHL       Shift Logical Left
SHOE	  Simple HTML Ontology Extension
SHR       Shift Logical Right
SHTML     Server-Side Include HyperText Markup Language
S-HTTP    Secure Hypertext Transfer Protocol
SHV       Standard High-Volume
.SHW      Show (file name extension)
SI        Shift-In + Source Index + System Information +
          System Integration
SIC       Standard Industrial Code
SID       Security Identifier + Serial Input Data +
          Station Identification [AT&T] +
          Symbolic Interactive Debugger + System ID
SIDF      System Independent Data Format
SIDH      System Identification for Home Systems
SIDT      Store Interrupt Descriptor Table
SIF	  Standard Input Format
SIFT      Stanford Information Filtering Tool
SIG       Special Interest Group
SIGCAT    Special Interest Group on CD-ROM Applications
          and Technology
SIM       Simulator + Subscriber Identity Module
SIMD      Single Instruction, Multiple Data-stream (processor)
SIMM      Single In-line Memory Module
SIMTEL    Simulation and Teleprocessing
SIMULA    Simulation (language)
SIO       Serial Input/Output (communications driver)
SIP       Session Initiation Protocol + Single In-line Package
SIPC      Simply Interactive Personal Computer [Microsoft]
SIPO      Serial In, Parallel Out
SIPP      Single In-line Pin Package
SIR       Serial Infrared [Hewlett-Packard]
SIRDS     Single-Image Random Dot Stereogram
SISL	  System Interrupt Steering Logic
SISNET	  Signal In Space Through The Internet
SI/SO     Serial In/Serial Out + Shift In/Shift Out
SIT       Special Information Tones
.SIT      Stuff-It (compressed file name extension) [Macintosh]
SIU       System Interface Unit
SIV	  System Integrity Verifier
SKIP      Simple Key-Management for Internet Protocols [Sun]
SKU#      Stock Keeping Unit Number
SLA       Service Level Agreement
SLB	  Static Load Balancing
SLC       Subscriber Line Concentrator
SLD	  Second-Level Domain (name)
SLDT      Store Local Descriptor Table
SLED      Single Large Expensive Disk
SLI	  Session Level Interface
SLIC      System Level Integration Circuit +
	  System Licensed Internal Code [IBM]
SLIM      Structured Language for Internet Markup
SLIP      Serial Line Interface Protocol
SLM       Spatial Light Modulator
SLMR      Silly Little Mail Reader
SLOSH     Sea, Lake and Overland Surge from Hurricane (program)
SLOT	  Scanned Laser Output Terminal
SLP       Service Location Protocol
SLR	  Single Lens Reflex
SLSI      Super Large-Scale Integration
SLSS      Systems Library Subscription Service [IBM]
SLU       Secondary Logical Unit + Spoken Language Understanding
SM        Set Mode + Shared Memory
SMA	  Software Migration Assistant [IBM]
SMART     Self-Monitoring Analysis and Reporting Technology
SMB       Server Message Block (protocol) [MII]
SMD       Surface Mounted Device
SMDR      Station Message Detail Recording
SMDS      Switched Multimedia/Multi-Megabit Data Service
SMF       Single Mode Fiber + System Manager Facility [Compaq]
SMI       System Management Interrupt [Intel]
SMIF      Standard Mechanical Interface
SMIL      Synchronized Multimedia Integration Language
S-MIME    Secure MIME
SMIT      System Management Interface Tool [IBM]
SMK       Software Migration Kit [Microsoft]
SML       Standard Meta Language
SMM       System Management Mode [Intel]
SMOBC     Solder Mask Over Bare Copper
SMP       Simple Management Protocol + Symbolic Manipulation
          Program + Symmetrical Multi-Processing +
          Symmetric Multiprocessor
.SMP      Sample (file name extension)
SMPC      Shared Memory Parallel Computer
SMPS      Switching Mode Power Supply
SMRAM     System Management Random Access Memory
SMS       Short Message Service [Sprint] + 
	  Short Messaging System +
          Storage Management Services [NetWare] +
          Storage Management Subsystem/System +
          Systems Management Server [Microsoft]
SMSW      Store Machine Status Word
SMT       Station Management (protocol) +
          Surface-Mount Technology
SMTP      Simple Mail Transfer Protocol
SMU       System Management Utility
SN        Serial Number
S/N       Signal-to-Noise (Ratio)
SNA       Systems Network Architecture [IBM]
SNAP      Sub-Network Access Protocol +
          Sub-Network Attachment Point
SNAPI	  Structured N-Dimensional Application Program
	  Interface [Oracle]
SND       Sound
SNEWS     Secure News Server [Internet]
SNMP      Simple Network Management Protocol
SNOBOL    String Oriented Symbolic Language (Programming Language)
SNP       Serial Number/Password [Omen Technology]
SNR       Signal-to-Noise Ratio
SNRM	  Set Normal Response Mode
SOA       Service-Oriented Architecture + Start Of Authority
SOAP	  Simple Object Access Protocol
SOC       System On a Chip
SOC.      Social Issues [USENET Newsgroup Category]
SOCKS     Socket Secure (server) [Internet]
SO-DIMM   Small Outline DIMM
SOE       Standard Operating Environment
SOH       Start of Header
SOHO      Small Office/Home Office
SOI	  Silicon-On-Insulator [IBM]
SOIC	  Small Outline Integrated Circuit
SOJ	  Small-Outline J-Lead
SOL       Simulation Oriented Language
SOM       Start of Message + System Object Model [IBM]
SONAR     Sound Navigation and Ranging
SONET     Synchronous Optical Network
SOP       Small Outline Package + Standard Operating Procedures
SOS       Silicon On Sapphire + Sophisticated Operating System +
          Standards and Open Systems
SOTA      State Of The Art
SOX       Sound Exchange
SP        Service Pack [IBM] + Stack Pointer + System Product
SPA       Secure Password Authentication [Microsoft] +
          Software Publishers Association
SPAN      Space Physics Analysis Network
SPAP	  Shiva Password Authentification Protocol
SPARC     Scalable Processor Architecture +
          Sun's Palo Alto Research Center
SPC       Small Peripheral Controller + Statistical Process Control
SPCL      Spectrum Cellular Corporation
SPCS      Stored Program Controlled Switch
SPD       Serial Presence Detect
SPEC      Systems Performance Evaluation Cooperative
SPF	  Sender Policy Framework + Shortest Path First +
          System Programming Facility
SPGA      Staggered Pin-Grid Array
SPI       Security Parameters Index + Service Provider Interface +
          SCSI Parallel Interface + Stateful Packet Inspection
.SPI	  Spool (file name extension)
SPID      Service Profile/Provider Identifier
SPIKE     Science Planning Intelligent Knowledge-Based
          Environment [STScI]
SPIRES    Stanford Public Information Retrieval System
          [Stanford University]
SPKI	  Simple Public Key Infrastructure
SPL       Spooler + System Programming Language [HP]
.SPL      Spell Checker (file name extension)
SPLD      Simple Programmable Logic Device
SPM       System Performance Monitor [IBM]
SPOOL     Simultaneous Peripheral Operations On Line
SPOT      Shared Product Object Tree [IBM] +
	  Smart Personal Object Technology [Microsoft]
SPP       Sequenced Packet Protocol + Standard Printer Port
SPPS      Scalable Power Parallel System [IBM]
SPR       Special Purpose Register +
          Statistical Pattern Recognition +
          Symmetrical Phase Recording
SPREAD  * Systems Programming, Research, Engineering
          and Development [IBM]
SPS       Secure Packet Shield + Shock Protection System +
          Standby Power System
SPSS      Statistical Package for the Social Sciences
SPT       Sectors Per Track
SPX       Sequenced Packet Exchange [Novell]
SQ        Squeezed (files)
SQE       Signal Quality Error (test)
SQL/DS    Structured Query Language/Data System [IBM]
SQOS      Secure Quality Of Service
SQRT      Square Root
SR        Shift Register
SRAM      Shadow Random Access Memory +
          Static Random Access Memory
SRAPI     Speech Recognition API
SRB       Source-Route Bridge
SRC	  System Resource Controller
.SRC      Source (file name extension)
SRD       Screen Reader System
SRDRAM    Self-Refreshed DRAM
SRGB      Sustained RGB (values)
SRM       Security Reference Monitor
SRO       Sharable and Read Only
SRP       Suggested Retail Price
.SRP      Script (file name extension)
SRPI      Server-Requester Programming Interface
SRQ       Service Request
SRR       Serially Reusable Resource
SRS       Sound Retrieval System
SS        Stack Segment + Single Sided + Seconds
SS7	  Signaling System 7 [Bellcore]
SSA       Serial Storage Architecture
SSAD	  Structured System Analysis and Design
SSAP      Source Service Access Point
SSCP      Systems Service Control Point [IBM]
SSD       Solid State Disk
SSEC    * Selective Sequence Electronic Calculator [IBM]
SSGA      System Support Gate Array
SSH       Secure Shell (protocol)
SSI       Server Side Includes + Single System Image +
          Small Scale Integration
SSL       Secure Socket Layer
SSMA	  Spread Spectrum Multiple Access
SSO	  Single Sign On
SSPI      Security Service Provider Interface [Microsoft]
SSR	  Secure Socket Relay
SSRP      Simple Server Redundancy Protocol [Cisco]
SST       Spread-Spectrum Technology +
          Systems Services and Technology
STA       Spanning Tree Algorithm
STAR      Self Defining Text Archival
STAX	  (StAX) Streaming API for XML
STB       Strobe
STC       Set Carry Flag
STD       Set Direction Flag + Standard
STDA      StreetTalk Directory Assistance [Banyan]
STDAUX    Standard Auxilary
STDERR    Standard Error
STDIN     Standard Input
STDIO.H   Standard Input/Output Header [C Programming Language]
STDM      Statistical Time Division Multiplexer
STDOUT    Standard Output
STDPRN    Standard Printer
STEP      Standard for Exchange of Product
.STF      Structured File (file name extension) [Lotus Agenda]
STI       Set Interrupt Flag
S/TK      Sectors Per Track
STL       Standard Template Library
STM	  Scanning Tunneling Microscope
STN       Super-Twist Nematic
.STORE    Businesses Offering Goods (Domain Name) [Internet]
STOS      Store String
STP       Secure Transfer Protocol + Shielded Twisted Pair (cable) +
          Signal Transfer Point +
          Synchronized Transaction Processing
STR       Store Task Register + Synchronous Transmitter Receiver
STRESS    Structural Engineering System Solver (Programming
          Language)
STRUDL    Structural Design Language (Programming Language)
STScI     Space Telescope Science Institute
STT       Secure Transaction Technology [Microsoft]
STX       Start of Text
.STY      Style (file name extension) [Ventura, Word, WordPerfect]
SUB       Subroutine + Substitute + Subtract
SUN       Sun Microsystems, Inc.
.SUP      Supplemental Dictionary (file name extension)
          [WordPerfect]
SVC       Switched Virtual Circuit
SVCD	  Super Video Compact Disk
SVF       Simple Vector Format
SVG       Scalable Vector Graphics
SVGA      Super Video Graphics Array
S-VHS     Super VHS
SVM       System Virtual Machine [Microsoft] +
	  System Volume Mangement
SVN       Switched Virtual Network [IBM]
SVR       Server
SVR#      System V Release Number [AT&T]
SVTC	  Secure Videoteleconference
S/W       Software
SWAC    * Mobile version of SEAC, built for deployment to White
          Sands, and named Standards Western Automatic Calculator
SWAIS     Simple Wide Area Information Server [Internet]
SWAP      Shared Wireless Access Protocol
SWIG      Simplified Wrapper and Interface Generator
SWISH     Simple Web Indexing System for Humans
SWP       Simple Web Printing
.SWP      Swap (file name extension)
.SYL      Syllabus (file name extension)
SYLK      Symbolic Link
.SYM      Symbols (file name extension)
.SYN      Synonym (file name extension)
SYNC      Synchronous
SYS       System
.SYS      System Configuration (file name extension) +
          System Device Driver (file name extension)
SYSADMIN  System Administrator
SYSGEN    System Generator
SYSLOG    System Log
SYSMOD    System Modification
SYSOP     System Operator
SYSREQ    System Request
SZ        Send ZModem [Unix]

T...

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TAB       Tape Automated Bonding
TACS      Total Access Communication System
TAD       Telephone Answering Device
TAG	  Technical Advisory Group
TAL	  Typed Assembly Language
TALOSS	  Three-Dimensional Advanced Localization 
	  Observation Submarine Software
TAO	  Track At Once
TAP       Telelocator Alphanumeric Protocol
TAPCIS    The Access Program for the CompuServe
          Information Service
TAPI      Telephony Applications Programming Interface
.tar      Tape Archive (archived file name extension) [Unix]
.tar.Z    Compressed Archived files (file name extension) [Unix]
TAS       Telephone Access Server + Total Access System
TASM      Turbo Assembler [Borland]
TAXI      Transparent Asynchronous Transceiver/Receiver Interface
TB        Terabyte (1,024 gigabytes)
          (One Thousand Billion characters of information)
T/B       Top and Bottom
TBBS      The Bread Board System (BBS)
TBGA      Tape Ball Grid Array
.TBK      Toolbook (file name extension)
TBU       Tape Backup Unit
TC        Test Control + Transmission Control
TCL       Tool Command Language
TCM       Trellis-Coded Modulation
TCO       Total Cost of Ownership
TCP       Tape-Carrier Package
TCPA	  Trusted Computing Platform Alliance [Intel]
TCP/IP    Transmission Control Protocol/Internet Protocol
TCT	  Terminal Control Table
TD        Transmit Data
.TDA      To Do Archive (file name extension) [Palm]
TDC       Tabular Data Control
TDD       Telecommunications Device for the Deaf +
	  Test Driven Development
TDtoDP    Tablet Coordinates to Display Coordinates
          (converting)
TDE       Terminal Display Editor
.TDF      Trace Definition File (file name extension) [OS/2] +
          Typeface Definition File (file name extension)
TDI       Transport Device Interface
TDM       Technical Document Management +
          Time Division Multiplexing
TDMA      Time Division Multiple Access
TDMS      Terminal Display Management System
TDP       Tag Distribution Protocol [Cisco] +
          Telelocator Data Protocol
TDSR      Transmitter Data Service Request
TDR       Time Domain Reflectometry
TE/2      Terminal Emulator/2 [Oberon]
TEB       Thread Environment Block
TEC       Tokyo Electronics Corporation
TED       Tiny Editor + Transient Electromagnetic Device
TEI       Terminal Endpoint Identifier
TELCO     Telephone Company
TEML      Turbo Editor Macro Language [Borland]
TEMP      Temporary
TER       Thermal Eclipse Reading [Sony]
TERMPWR   Terminator Power
TFDD      Text File Device Driver
TFEL      Thin-Film Electroluminescent
.TFM      Tagged Font Metric (file name extension)
TFT       Thin-Film Transistor (screens)
TFTP      Trivial File Transfer Protocol
.TGA	  Taga Bitmap (file name extension)
THD       Total Harmonic Distortion
.THD      Thread (file name extension)
THINNET	  Thin Ethernet
THOMAS    The (U.S.) House (of Representatives) Open Multimedia
          Access System
THOR      Tandy High-Performance Optical Recording
THR       Transmit Holding Register
.THS      Thesaurus (file name extension)
TI        Texas Instruments, Inc.
TIA       Telecommunications Industry Association +
          The Internet Adapter [Internet]
TIB	  Tag Information Base
TID       Target ID
TIES      Time Independent Escape Sequence
.TIF      Tagged Image File (filename extension)
TIFF      Tagged Image File Format
TIGA      Texas Instruments Graphics Architecture
TIGER     Topologically Integrated Geographic Encoding
          and Referencing
TIIAP     Telecommunications and Information Infrastructure
          Assistance Program [NII]
TIL	  Tech Info Library [Macintosh]
TIM       Technical Information Memo [Compaq]
TIMEZONES - - - - - - - - - - - - - - - - - GMT Offsets
                                   Offsets Eastward from GMT (+)
                                   Offsets Westward from GMT (-)
          AST - Atlantic Standard Time          -4:00
          AT  - Azores Time                     -2:00
          AHD - Alaska-Hawaii Daylight           :::
          AHS - Alaska-Hawaii Standard         -10:00
          BLT - Baghdad Local Time              +3:00
          BST - British Summer Time              :::
          CAT - Central Alaska Time            -10:00
          CCT - China Coast Time                +8:00
          CDT - Central Daylight Time            :::
          CET - Central European Time           +1:00
          CLT - Cairo Local Time                +2:00
          CST - Central Standard Time           -6:00
          EAD - East Australian Daylight         :::
          EAS - East Australian Standard       +10:00
          EDT - Eastern Daylight Time            :::
          EET - Eastern European Time           +1:00
          EMT - Eastern Mediterranean           +2:00
          EST - Eastern Standard Time           -5:00
          GMT - Greenwich Mean Time             +0:00
          HST - Hawaii Standard Time           -10:00
          JST - Japanese Standard Time          +9:00
          MDT - Mountain Daylight Time           :::
          MET - Middle European Time            +1:00
          MST - Mountain Standard Time          -7:00
          MTS - Moscow Time Standard            +3:00
          MTD - Moscow Time Daylight             :::
          NT  - Nome Time                      -11:00
          NZT - New Zealand Time               +12:00
          PDT - Pacific Daylight Time            :::
          PST - Pacific Standard Time           -8:00
          PST - Pakistan Standard Time          +5:00
          WAS - West Australian Standard        +7:00
          WAT - West Africa Time                -1:00
          WED - Western Europe Daylight          :::
          WES - Western Europe Standard         +0:00
          YDT - Yukon Daylight Time              :::
          YST - Yukon Standard Time             -9:00
          IDLE- International Date Line East   +12:00
          IDLW- International Date Line West   -12:00
TIMI      Technology Independent Machine Interface [IBM]
TIMS      Text Information Management Systems
TINA      Telecommunication Information Networking Architecture
TIP       Terminal Interface Processor +
          Transaction Internet Protocol
TITOFET   Tunneling-In, Tunneling-Out Field Effect Transistor
TKIP	  Temporal Key Integrity Protocol
TK/TK     Track to Track
TLA       Three-Letter Acronym
TLB       Translation Lookaside Buffer
.TLB      Table (file name extension)
TLD       Top Level Domain
TLI       Transport Layer Interface
TLS       Transport Layer Security
TLU       Table Lookup
.TLX      Telex (file name extension)
TM        Trademark
TMDS      Transition Minimized Differential Signaling
.TML      Template (file name extension)
TMP       Temporary
TMS       Traffic Management System [BA]
TN        Twisted Nematic
TNC       Terminal Node Controller
TNEF	  Transport Neutral Encapsulation Format
TNO       The Netherlands Organization
TOC       Table Of Contents
TOD       Time Of Day
TOF	  Tiny Open Firmware
TOP       Technical and Office Protocol
TOS	  Terms Of Service
TPC       Transaction-Processing Performance Council
TPF       Transactions Processing Facility [IBM]
TPI       Tracks Per Inch
TPL       Table Producing Language +
          Transaction Processing Language
TPM       Transactions Per Minute
TPORT     Twisted Pair Port Transceiver [AT&T]
TP-PMD	  Twisted Pair-Physical Medium Dependent (cable)
TPS       Transactions Per Second +
          Transaction Processing System
TPW       Turbo Pascal for Windows
TQFP      Thin Quad Flat Pack
TQM       Total Quality Management
TR        Terminal Ready
T/R       Transmit/Receive
TRACERT   Trace Route [Microsoft]
TRADIC  * Transistorized Airborne Digital Computer
          (Name of first computer to be entirely
          transistorized)
.TRM      Terminal (file name extension)
TRN       Threaded Read News [Internet] + Token Ring Network
TRON      The Real-Time Operating System Nucleus
TS        Top Secret
TSA       Target Service Agent + Technical Support Alliance +
          Telephony Services Architecture
TSAPI     Telephony Services Application Program
          Interface [AT&T + Novell]
TSB       Termination Status Block
TSD       Type-Specific Driver
TSE       The Semware Editor
TSID	  Transmitting Subscriber Identification [Microsoft]
TSN	  Transition Sequence Number
TSO       Time Sharing Option
TSOP	  Thin Small-Outline Package
TSP       Telephony Service Provider
TSR       Terminate and Stay Resident
TSS       Task State Segment + Time Sharing System
TS/SI     Top Secret/Sensitive Information
.TST      Test (file name extension)
TSTN      Triple Supertwisted Nematic
TSV       Tab Separated Values
TT        Typewriter Text
TTA       Transport-Triggered Architecture
TTCN      Tree and Tabular Combined Notation
.TTF      TrueType Font (file name extension)
TTL       Transistor-Transistor Logic
TTP       Thermal-Transfer Printing
TTS       Text-To-Speech + Transaction Tracking System
TTY       Teletype
TUCOWS    The Ultimate Collection of Winsock Software
TUI       Text-Based User Interface [WordPerfect]
TUMS      Table Update and Management System [Stanford University]
.TUT      Tutorial (file name extension)
TVF       Table of contents Verbosely from File [UNIX]
TVFS      Toronto Virtual File System [IBM]
TVI       Television Interference
TVOL      Television On-Line
TWAIN     Technology Without Any Interesting Name
          (connection between application and scanner software)
TWEAKUI	  Tweak User Interface
TWIP	  Twenty In Point (as in 20 twips/pixel) [Microsoft]
TWX       Teletypewriter Exchange Service
TXD       Transmit Data
.TXF      Tax Exchange Format (file name extension)
TXT       Text
TXT2STF   Text To Structured File [Lotus Agenda]
TZ        Time Zone [Unix]

U...

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UA        User Agent + User Area
UAE       Unrecoverable Application Error
UAM       User Authentication Method
UART      Universal Asynchronous Receiver/Transmitter
UAS	  User Application Software
UBE	  Unsolicited Bulk Email
UBR       Unspecified Bit Rate
.UC2      Compressed File (file name extension) [UltraCompressor]
UCB	  Universal Content Broker
UCBE	  Unsolicited Commercial Bulk Email
UCE       Unsolicited Commercial Email
UCL       Universal Communications Language
UCS       Unicode Conversion Support + Universal Character Set +
          User Coordinate System
UCT       Universal Coordinated Time
UDA       Universal Data Access [Microsoft]
UDB       Universal Data Base
UDC       Universal Decimal Classification + User Defined Commands
UDD       User Data Document
UDDI	  Universal Description, Discovery and Integration
UD-DVD	  Ultra-Definition Digital Video Disk
UDE       Universal Data Exchange
UDEC    * Universal Digital Electronic Computer [Burroughs]
UDF       Universal Disk Format + User Defined Functions
UDG       User Defined Gateway
UDMA	  Ultra Direct Memory Access
UDP       User Datagram Protocol
UDT       Uniform Data Transfer + User-Defined Type
UEMS	  Unsolicited Electronic Mail Solicitation
UFS       Universal\Unix File System
UG        User Group
UHCI      Universal Host Controller Interface
UHF       Ultra-High Frequency
UHL       Universal Hypertext Link
UI        Unix International + User Interface
UIC       User Identification Code
UID       User Identifier
UIMS      User Interface Management System
UL        Underwriters Laboratories +
          Unordered List + Upload
ULA       Uncommitted Logic Array
ULN       Universal Link Negotiation
ULSI      Ultra Large Scale Integration
UMA       Unified Memory Architecture
UMB       Upper Memory Block [LIM/AST]
UML       Unified Modeling Language
UMS	  User Mode Scheduler
UMTS      Universal Mobile Telecommunications System
UNC       Universal Naming Convention +
          Uuencoded Netnews Collator [Unix]
UNCOL     Universal Computed Oriented Language
UNEP	  Unbundled Network Platform
UNI       User-Network Interface
UNICOM    Universal Integrated Communication (System)
UNICOS    Universal Compiler FORTRAN compatible
UNII      Unlicensed National Information Infrastructure
UNIVAC    Universal Automatic Computer
UNIX      (AT&T Bell Laboratories Operating System)
UNMA      Unified Network Management Architecture
UNSPSC	  Universal Standard Products and Services Classification
UP        Uniprocessor
UPC       Universal Product/Program Code + User Parameter Control
UPG       Upgrade
UPL       User Program Language
UPM       Unix Programmer's Manual +
          User Profile Management [IBM]
UPNP	  (UPnP) Universal Plug and Play
UPS	  United Parcel Service (company) +
          Uninterruptible Power Supply/System
URC       Uniform Resource Characteristics +
          Uniform Resource Citation
UREP      Unix RSCS Emulation Protocol (protocol)
URI       Uniform Resource Identifier
URL       Uniform Resource Locator
URN       Uniform Resource Name/Number
US        Unit Separator
USART     Universal Synchronous-Asynchronous Receiver/Transmitter
USB       Universal Serial Bus [Intel]
US-CERT	  United States Computer Emergency Readiness Team
USENET    User's Network [Internet]
USERID    User Identification
USOC      Universal Service Ordering Code
USQ       Unsqueezed (files)
USR       US Robotics (corporation)
USRT      Universal Synchronous Receiver/Transmitter
USSA      User Supported Software Association (United Kingdom)
UT        User Terminal
UTC       Coordinated Universal Time
UTF	  Unicode Transformation Format
UTI       Universal Text Interchange/Interface
UTP       Unshielded Twisted-Pair (cable)
UU        Uuencode/Uudecode
UUCP      Unix-To-Unix Copy Protocol
UUD       UUDecoding [Unix]
UUDECODE  Unix-To-Unix Decoding
UUE       UUEncoding [Unix]
UUENCODE  Unix-To-Unix Encoding
UUI       User-To-User Information [AT&T]
UUID      Universal Unique Identifier
UV        Ultraviolet
UWB	  Ultra-Wide Band
UWR	  Ultra Wideband Radio
UXGA	  Ultra Extended Graphics Array

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VA        Virtual Address + Visual Age [IBM]
VAD       Value Added Dealer
VADD      Value Added Disk Driver
VADSL     (See DSL)
VAI	  Video As Input
VAL       Value + Voice Application Language
.VAL      Validity Checks (file name extension) [Paradox]
VAM       Virtual Access Method
VAN       Value Added Network
VAP       Value Added Process
VAR       Value Added Reseller + Value Added Retailer + Variable
VAST      Variable Array Storage Technology
VAX/VMS   Virtual Address Extension/Virtual Memory System [DEC]
VB        Variable Block + Visual Basic [Microsoft]
VBA       Visual Basic for Applications [Microsoft]
VBE/AI    Vesa Bios Extension/Audio Interface
VBI       Vertical Blanking Interval
VBNS      Very High Speed Backbone Network Service [MCI + NSF]
VBR       Variable Bit Rate
VBRUN     Visual Basic Runtime
VBS       Visual Basic Script
.VBX      Visual Basic Extension (file name extension)
VCC       Virtual Channel Connection
VCD       Video Compact Disk + Virtual Communications Driver
VCI       Virtual Circuit Identifier
VCL       Visual Class/Component Library
VCM	  Virtual Channel Memory
VCN       Virtual Cluster Number
VCOS      Visual Caching Operating System [AT&T]
VCPI      Virtual Control Program Interface
VCR       Video Cassette Recorder
VDD       Virtual Device Driver
VDDM      Virtual Device Driver Manager
VDE       Video Display Editor + Visual Development Environment
VDI	  Virtual Device Interface
VDISK     Virtual Disk
VDM       Virtual DOS Machine [IBM]
VDMAD     Virtual Direct Memory Access Device [Microsoft]
VDS       Virtual DMA Services
VDSL      (See DSL)
VDT       Video Dial Tone + Video Display Terminal
VDU       Video Display Unit + Visual Display Unit
VEGA      Video-7 Enhanced Graphics Adapter [Video-7, Inc.]
VEMM      Virtual Expanded Memory Manager
VEMMI     Versatile Multimedia Interface
VER       Verify + Version
VERONICA  Very Easy Rodent-Oriented Net-Wide Index to
          Computer Archives [Internet]
VERR      Verify Read Access
VERW      Verify Write Access
VES       Video Encoding Standard [Oracle] +
	  Virtual Execution System
VESA      Video Electronics Standards Association
VF        Virtual Floppy
VFAT      Virtual File Allocation Table [Microsoft]
V.FC      Version.First Class (communications standard)
VFD       Vacuum Fluorescent Display
VFW       Video For Windows [Microsoft]
VGA       Video Graphics Array
VGC       Video Graphics Controller
VHDL      VHSIC Hardware Description Language
VHF       Very-High Frequency
VHS       Very High Speed + Video Home System +
          Virtual Host Storage
VHSIC     Very High Speed Integrated Circuit
VI        Visual Interactive (editor) [UNIX]
VIA       Virtual Interface Architecture [Intel]
VIE       Virtual Information Environment
VIF       Virtual Interface + Virtual Interrupt Flag
VIM       Vendor Independent Mail +
          Vendor Independent Messaging + Video Interface Module
VIO       Video Input/Output + Virtual Input/Output
VINES     Virtual Networking System [Banyan]
ViP       Visual Programming [Lotus]
VIP       Variable Information Processing +
          Video Information Provider +
          Virtual Interrupt Pending +
	  Visual Interactive Parser
VIPER     Verifiable Integrated Processor for
          Enhanced Reliability
VIS       Video Information System [Tandy] +
	  Viewable Image Size +
          Visual Instruction Set [Sun] +
          Voice Information System
VJ HEADER Van Jacobsen Header (compression) [Unix]
VLA	  Variable-Length Array
VLAN      Virtual Local Area Network
VL-BUS    Vesa Local-Bus [VESA]
VLD       Variable-Length Decoder
VLF       Very Low Frequency
VLINK     Visited Link [HTML]
VLIW      Very Large Instruction Word
VLM       Virtual Loadable Module
VLSI      Very Large Scale Integration
VLSIPS    Very Large Scale Immobilized Polymer Synthesis
VLT       Variable List Table
VM        Virtual Machine + Virtual Memory
VMA       Virtual Memory Address
VMB       Virtual Machine Boot
VMD	  Video Motion Detection
VME       Versa Module Eurocard +
          Virtual Memory Environment
VML       Vector Markup Language [Microsoft]
VMM       Virtual Machine/Memory Manager
VMOS      Vertical MOS
VMP       Virtual Modem Protocol
VMS       Virtual Machine Storage + Virtual Memory System +
          Voice Message System
VMT       Virtual Memory Technique
VNA       Virtual Network Architecture
VNC	  Virtual Network Computing
VNOS	  Visual Network Operating System
VOC       Creative Voice (format) [Sound Blaster]
VOD       Video On Demand
VOFDM	  Vector Orthogonal Frequency Division
  	  Multiplexing [Cisco]
VOIP      Voice Over Internet Protocol
VOL       Volume
VOM       Volt-Ohm-Milliammeter
VOR       Visions Of Reality
VOS       Verbal/Virtual/Voice Operating System
VP        Virtual Path
VPD       Virtual Printer Device + Vital Product Data [IBM]
VPDN      Virtual Private Data Network
VPDS      Virtual Private Data Service [MCI]
VPE       Video Port Extensions [Microsoft] +
          Visual Programming Environment
VPL       Virtual Programming Language
VPM       Video Port Manager
VPN       Virtual Page Number + Virtual Private Network
VPS       Voice Processing System
VPSC      Vault, Process, Structure, Configuration
VPT       Virtual Print Technology [Dataproducts]
VR        Virtual Reality + Voltage Regulated/Regulator
VRAM      Video Random Access Memory
VRD       Virtual Retinal Display
VRE       Voltage Regulated Extended
VRM       Vendor Relationship Management + Voltage Regulator Module
VRML      Virtual Reality Modeling Language
          (originally named Virtual Reality Markup Language)
VROOMM    Virtual Real-time Object Oriented
          Memory Manager [Borland]
VRRP	  Virtual Router Redundancy Protocol
.VRS      WordPerfect Graphics Driver (file name extension)
VRT       Voltage Regulation Technology [Intel]
VRU       Voice Response Unit
VS        Virtual Storage
VSAM	  Video Surveillance and Monitoring +
          Virtual Storage Access Method
VSAT      Very Small Aperture Terminal
VSE       Virtual Storage Extended
VSF       Vertical Scanning Frequency
VSI       Virtual Socket/Switch Interface
VSIO      Virtual Serial Input Output
VSM       Virtual Shared Memory + Virtual Storage Management +
          Visual System Management [IBM]
VSN       Volume Serial Number
VSOS      Virtual Storage Operating System
VSWR	  Voltage Standing Wave Ratio
VSYNC     Vertical Sync
VT        Vertical Tab
VTAM      Virtual Telecommunications Access Method [IBM]
VTNS      Virtual Telecommunications Network Service
VTS       Volume Tracking Driver
VUI       Video User Interface
VUP       VAX Unit of Performance
VWB       Visual WorkBench [Microsoft]
VWM       Virtual Window Manager
VXA       Variable-Speed Architecture [Ecrix]
VxD       Virtual Extended Driver [Microsoft]
.VXD      Virtual Device (file name extension) [Microsoft]
VXML	  Voice Extensible Markup Language
V&V       Verification and Validation

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W/        With
W3        (see WWW)
W3A       World Wide Web Applets
W3C       World Wide Web Consortium
W4        What-Works-With-What
WAAS      Wide Area Augmentation System
WABI      Windows Application Binary Interface [SunSoft]
WAE	  Wireless Application Environment
WAI	  Web Accessibility Initiative +
          Web Application Interface [Netscape]
WAIS      Wide Area Information Server
WAITI     Wait-For-Interrupt
WAITS     Wide Area Information Transfer System
WAN       Wide Area Network
WAP       Wireless Application Protocol
WAR	  Web Archive
WARP	  Web Service Aggregtion, Rely and Propogation
WATS      Wide Area Telecommunications Service
.WAV      Waveform Audio (file name extension)
WBEM      Web-Based Enterprise Management
WC        Word Count
W-CDMA	  Wideband CDMA
WCS       World Coordinate System
WD-40	  Water Displacement-40th Attempt
WDDX	  Web Distributed Data Exchange
WDL       Windows Driver Library [Microsoft]
WDM       Wavelength Division Multiplexing +
          Windows Driver Model [Microsoft]
WDRAM     Windows Dynamic Random Access Memory
WEA	  Web Enabled Application
.WEB      Entities Emphasizing the WWW (Domain Name) [Internet]
WEBDAV	  Web Based Distributed Authoring and Versioning
WEBNFS    Web Network File System [Sun]
WEFT	  Web Embedding Fonts Tool [Microsoft]
WELL      Whole Earth 'Lectronic Link (BBS)
WEP	  Wired Equivalent Privacy +
	  Wireless Encription Protocol
WFM       Wired For Management [Intel]
WFQ	  Weighted Fair Queuing [Cisco]
WFW       Windows For Workgroups [Microsoft]
WGS       Work Group System
WHAM      Waveform Hold and Modify [Microsoft]
WHC       Workstation Host Connection
WIB	  World wIde weB (suggested oral replacement of
	  nine-syllable 'WWW' using one-syllable 'WIB'
WIFI	  (Wi-Fi) Wireless Fidelity
WIM	  Wireless Instant Messaging
WIMP	  Windows, Icons, Menus and Pulldowns
WIN 9.X   Windows95/Windows98
WIN...CE  Windows Compact Edition [Microsoft]
WINDBG    Windows Debugger [Microsoft]
WINE      Windows Emulator
WINForum  Wireless Information Networks Forum
WIN...MCE Windows Media Center Edition [Microsoft]
WIN...ME  Windows Millennium Edition [Microsoft]
WINS      Windows Internet Naming Service [Microsoft]
WIN...SE  Windows Second Edition [Microsoft]
WINSOCK   Windows Open Systems Architecture [Microsoft] +
          Windows Sockets
WINWORD   Word For Windows [Microsoft]
WIN...XP  Windows The "Experience" [Microsoft]
WISE      WordPerfect Information System Environment
WISP	  Wireless Internet Service Provider
WIT       Web Interactive Talk [Internet]
.WKB      Workbook (file name extension) [WordPerfect]
.WKE      Worksheet (file name extension) [Lotus 1-2-3] [LDC]
.WKQ      Spreadsheet (file name extension) [BORQU]
.WKS      Worksheet (file name extension) [Lotus 1-2-3] [LDC]
.WKZ      Compressed Spreadsheet (file name extension) [BORQU]
.WK1      Worksheet (file name extension) [Lotus 1-2-3] [LDC]
WL        Word Line
WLAN	  Wireless Local Area Network
.WLG      Dr. Watson Log (file name extension)
WLL	  Wireless Local Loop
.WMA      Windows Media Audio (file name extension) [Microsoft]
WMC       Workflow Management Coalition
WME	  Wireless Multimedia Enhancements
.WMF      Windows Metafile Format (file name extension) [Microsoft]
WMFSDK	  Windows Media Format Software Development Kit [Microsoft]
WMI	  Windows Management Instrumentation [Microsoft]
WML	  Wireless Markup Language
WMP	  Windows Media Player [Microsoft]
WMRM      Write Many, Read Many
WMT	  Windows Media Technologies [Microsoft]
WNIC      Wide-Area Network Interface Co-Processor
WNIM      Wide-Area Network Interface Module
W/O       Without
WORM      Write Once, Read Many
WOS       Workstation Operating System
WOSA      Windows Open Services/Systems Architecture [Microsoft]
WOW       Window On Windows [Microsoft]
WP        WordPerfect + Word Processing + Write Protected
WPA	  Wi-Fi/Wireless Protected Access
.WPD      Windows Printer Description (file name extension)
.WPG      WordPerfect Graphics (file name extension)
WPHD      Write-Protect Hard Disk
.WPK      Keyboard (file name extension) [WordPerfect]
WPM       Words Per Minute
.WPM      Macro (file name extension) [WordPerfect]
WPOS      Workplace Operating System
WPS       Windows Printing System [Microsoft] +
          Workplace Shell [OS2]
WPVM      Windows Parallel Virtual Machine
.WQ1      Spreadsheet (file name extension) [BORPQU]
.WQ!      Compressed Spreadsheet (file name extension) [BORPQU]
WRAM      Windows Random Access Memory
WRE 	  Weighted Random Early Detection [Cisco]
.WRI      Write (file name extension)
WRK       Windows Resource Kit [Microsoft]
WS        WordStar + Workstation
WSAPI     Web Site Application Program Interface [O'Reilly]
WSDL	  Web Services Definition/Description Language [IBM/Microsoft]
WSH       Windows Scripting Host [Microsoft]
WSP	  Wireless Session Protocol
WSUI	  Web Services User Interface
WT        Write Through
WTA	  Wireless Telephony Application
WTLS	  Wireless Transport Layer Security
WTM       Wired For Management
WWIS      World Wide Information System [Internet]
WWW       World-Wide Web [Internet]
WYSBYGI   What You See Before You Get It
WYSIWYG   What You See Is What You Get

X...

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XA        Extended Architecture + Extended Attribute
XACML	  Extensible Access Control Markup Language
XAPIA     X.400 Application Program Interface Association
X2B       Hexadecimal to Binary [REXX]
.XBM      X-Windows Bitmaps (file name extension) (black and white)
XBRL	  Extensible Business Reporting Language
X2C       Hexadecimal to Character [REXX]
XCHG      Exchange
XCMD      External Command
XCOPY     Extended Copy
X2D       Hexadecimal to Decimal [REXX]
XDF       Extended Density Format [IBM]
XDR       Extended/External Data Representation
XFCN      External Function
XFDL	  Extensible forms Description Language
XGA       Extended Graphics Array [IBM]
XHTML	  Extensible HyperText Markup Language
XID       Exchange Identifier
XIOS      Extended Input/Output System
.XLA      Add-In (file name extension) [Microsoft-Excel]
XLAT      Translate
XLF       Exceptional Fortran [IBM]
XLIFF	  XML Localization Interchange File Format [IBM]
.XLK      Backup (file name extension) [Microsoft-Excel]
XLL       Extensible Link Language
XLM       Excel Macro Language [Microsoft]
.XLT      Template (file name extension) [Microsoft-Excel]
XMIT      Transmit
XML       Extensible Markup Language
XMM       Extended Memory Manager [LIM/AST]
XMS       Extended Memory Specification [LIM/AST]
XNS       Xerox Network System (protocol) [Xerox]
XOFF      Transmitter Off
XON       Transmitter On
XOR       Exclusive OR (Also EOR)
XP	  Extreme Performance [Compaq]
XPCOM	  Cross Platform Component Object Model [Mozilla]
XPE	  XP Embedded (see WIN...XP) [Microsoft]
XPRM      Xerox Print Resources Manager [Xerox]
.XPM	  X-Windows Pixelmaps (file name extension) (color)
XRI	  Extensible Resource Identifier
XRNS	  Extensible Resource Name System
XRT       Extensions for Real-Time
XSL       Extensible Style Language
XSLT	  Extensible Stylesheet Transformation
XSMD      Extended Storage Module Drive (interface)
XSSI      Extended Server Side Includes
XTAL      Crystal
XTCLK     External Transmit Clock
XUL       Extensible User-Interface Language [Netscape]

Y...

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YAM       Yet Another Modem [Omen Technology]
YAHOO     Yet Another Hierarchically Officious Oracle [Internet]
Y2K       Year 2000
(Y/N)?    (Asks for a YES or NO decision)
YTD       Year To Date

Z...

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.z        Packed file (file name extension - using Pack/Unpack
          program)..lower case z..[Unix]
.Z        Compressed file (file name extension - using
          Compress/Uncompress program)..upper case Z..[Unix]
ZAK       Zero Administration Kit [Microsoft]
ZAW       Zero Administration for Windows [Microsoft]
ZBR       Zone-Bit Recording [IBM]
Z-CAV     Zoned Constant Angular Velocity
ZDL       Zero Delay Lockout
ZDS       Zenith Data Systems
ZIF       Zero-Insertion Force (socket)
ZIP       Zigzag In-Line Package +
          Zone Improvement Plan (ZIPcode)
.ZIP      Compressed File (file name extension) [PKWare]
.ZOO      Compressed File (file name extension) [Dhesi]
ZPV       Zoomed Port Video [Toshiba]
ZSL       Zero Slot LAN
@         At + Commercial At
{ }	  Braces
[ ]	  Square Brackets
~         Tilde
(_)	  Underscore
...	  Ellipsis
*         Wildcard character (asterisk)
*.*       Star-Dot-Star (represents
          Any file name.Any file name extension)
.$$$      Temporary File (file name extension)
1GL       First Generation Language (machine language)
24/7	  Twenty-Four Hours a Day, Seven Days a Week
286       80286 (microprocessor)
2GL       Second Generation Language (assembly language)
386       80386 (microprocessor)
3COM      3 Com Corporation (The 3 Coms are
          Computer, Communications and Compatibility)
3GL       Third Generation Language (programming language)
486       80486 (microprocessor)
4GL       Fourth Generation Language (descriptive language)
6DOF      Six Degrees Of Freedom

BABEL: A GLOSSARY OF COMPUTER ORIENTED ABBREVIATIONS AND ACRONYMS Version 05A

Copyright (C) 1989-2005 Irving & Richard Kind All Rights Reserved c/o K & D, One Church Lane, Baltimore, MD 21208 Jan 2005 version = 05A Jan 2006 version = 06A May 2005 version = 05B May 2006 version = 06B Sep 2005 version = 05C Sep 2006 version = 06C

APPENDIX A...

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DOWNLOADING BABEL

To obtain the latest version of BABEL use any of these methods:

********************* For HTML Format ONLY ********************* http://www.geocities.com/ikind_babel/babel/babel.html ************************************** For ALL Formats: HTML, TEXT and PALM ************************************** http://www.geocities.com/ikind_babel/index.html NOTE for all methods: After Jan 1, 2005 BABEL TXT, HTML, ZIP & PALM will contain Version 05A After May 1, 2005 BABEL TXT, HTML, ZIP & PALM will contain Version 05B After Sep 1, 2005 BABEL TXT, HTML, ZIP & PALM will contain Version 05C


APPENDIX B...

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    The following examples are included to only serve as a very
brief introduction to what may be found when reading email and news
groups and when using IRC on the Internet.

                        - - - - - - -

    In email and news, "smiley faces" (emoticons), rather than
words, are used to express the writer's feelings.  Turn your head to
the side to read them.

        :-)     Smile           :-D     Laughing

        :-]     Smirk           :-(     Frown

        ;-)     Wink            :-X     Close-mouthed

        8-)     Wide-eyed       :-O     Open-mouthed

  also

        <jk>    Just kidding    <g>     Grin

                        - - - - - - -

    In email and during on-line conversations, a variety of letter
groups are used to abbreviate the writer's comments, such as:

    BRB   Be right back         IMHO   In my humble opinion

    BTW   By the way            ROFL   Rolling on the floor
                                       laughing

    FOAF  Friend of a friend    TIA    Thanks in advance


APPENDIX C...

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COUNTRY DOMAIN NAMES

    At the present time there are over 200 recognized Country
Domain names.  Two-letter abbreviations that represent the
country names are used in addresses seen on the Internet.  The
following names (145 to date) represent the country of origin
from where someone has downloaded BABEL (babel.html).  This list
should be useful when checking the origin of your own mail.

        .ad     Andorra
        .ae     United Arab Emirates
        .ag     Antigua and Barbuda
        .ai     Anguilla
        .al     Albania
        .am     Armenia
        .ar     Argentina
        .at     Austria
        .au     Australia
        .aw     Aruba
        .ba     Bosnia-Herzegovina
        .be     Belgium
        .bg     Bulgaria
        .bh     Bahrain
        .bm     Bermuda
        .bn     Brunei Darussalam
        .bo     Bolivia
        .br     Brazil
        .bs     Bahamas
        .bw     Botswana
        .by     Belarus
        .bz     Belize
        .ca     Canada
	.cc	Cocos (Keeling) Islands
        .ch     Switzerland
        .ci     Cote D'Ivoire (Ivory Coast)
        .cl     Chile
        .cn     China
        .co     Colombia
        .cr     Costa Rica
        .cu     Cuba
        .cy     Cyprus
        .cz     Czech Republic
        .de     Germany
        .dk     Denmark
        .dm     Dominica
        .do     Dominican Republic
        .ec     Ecuador
        .ee     Estonia
        .eg     Egypt
        .es     Spain
        .et     Ethiopia
        .fi     Finland
        .fj     Fiji
        .fm     Micronesia
        .fo     Faroe Islands
        .fr     France
        .gb     Great Britain
        .ge     Georgia
        .gi     Gibraltar
        .gl     Greenland
	.gp	Guadeloupe (French)
        .gr     Greece
        .gt     Guatemala
        .gu     Guam
        .gy     Guyana
        .hk     Hong Kong
        .hn     Honduras
        .hr     Croatia
        .hu     Hungary
        .id     Indonesia
        .ie     Ireland
        .il     Israel
        .in     India
        .ir     Iran
        .is     Iceland
        .it     Italy
        .jm     Jamaica
        .jo     Jordan
        .jp     Japan
        .ke     Kenya
        .kg     Kyrgyzstan
        .kr     Korea (South)
        .kw     Kuwait
        .kz     Kazakhstan
        .lb     Lebanon
        .lc     Saint Lucia
        .li     Liechtenstein
        .lk     Sri Lanka
        .lt     Lithuania
        .lu     Luxembourg
        .lv     Latvia
        .ma     Morocco
        .mc     Monaco
        .md     Moldova
        .mk     Macedonia
        .mn     Mongolia
        .mo     Macau
        .mt     Malta
        .mu     Mauritius
        .mv     Maldives
        .mx     Mexico
        .my     Malaysia
        .na     Namibia
        .nc     New Caledonia (French)
	.nf	Norfolk Island
        .ng     Nigeria
        .ni     Nicaragua
        .nl     Netherlands
        .no     Norway
        .np     Nepal
        .nu     Niue
        .nz     New Zealand
        .om     Oman
        .pa     Panama
        .pe     Peru
        .pf     Polynesia (French)
        .pg     Papua New Guinea
        .ph     Philipines
        .pk     Pakistan
        .pl     Poland
        .pt     Portugal
        .py     Paraguay
        .qa     Qatar
        .ro     Romania
        .ru     Russian Federation
        .sa     Saudi Arabia
        .se     Sweden
        .sg     Singapore
        .si     Slovenia
        .sk     Slovak Republic
        .su     USSR (former)
        .sv     El Salvador
        .th     Thailand
        .tn     Tunisia
	.to     Tonga
        .tr     Turkey
        .tt     Trinidad and Tobago
        .tw     Taiwan
        .tz     Tanzania
        .ug     Uganda
        .uk     United Kingdom
        .us     United States
        .uy     Uruguay
        .uz     Uzbekistan
        .va     Vatican City State
        .ve     Venezuela
        .vi     Virgin Islands (USA)
        .vn     Vietnam
        .ye     Yemen
        .yu     Yugoslavia
        .za     South Africa
        .zm     Zambia
        .zw     Zimbabwe


NOTES

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NOTE 1

SUBMITTING A NEW ENTRY....Each submitted entry is first verified before inclusion into BABEL. Please let me know where you have seen your submission used or described; i.e., name of publication, page number, who uses it, where it is used, etc. Furnish COMPLETE details in order that your entry may be verified from this end via the Internet

Submit your entry via e-mail to: BabelGlossary@erols.com Include the word BABEL or GLOSSARY on your Subject line.

NOTE 2

SAVING AND PRINTING....To have instant access to BABEL, I suggest that you download the complete file rather than to search on line.

For the HTML version, download babel.html or babelhtm.zip and save it on a floppy disk or on your hard drive. Use your browser to locate any entry instantly.

For Printing, use the TEXT version. Download babeltxt.zip, unzip it, and set your printer for sixty (60) lines per page, with a six (6) character left hand margin, using 8-1/2" x 11" paper. Punch holes for a loose leaf binder and keep it on your desk. Again, instant access.


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