BABEL: A Glossary of Computer Related Abbreviations and Acronyms BABEL: A Glossary of Computer Oriented Abbreviations and Acronyms


  • A Glossary of Computer Oriented Abbreviations and Acronyms
  • Version 96A
  • Copyright ©: 1989-1996.......Irving Kind.......All Rights Reserved
           (1) Using the vertical scroll bar.
           (2) Using the PgDn key.
           (3) Clicking on one of the (TOP) or (UP/DN to ...) or (BOTTOM)
    	   buttons found at the top of each letter-group section.
           (4) START by clicking on any letter-group button below.
  • (Opening Page)
  • (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)
         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, name it.  This glossary can never be
    considered complete and that is why I now request your help.  Look
    over the definitions and let me have your feedback.  If you have
    ever seen letter combinations that you also did not understand,
    please drop me a note at the address below.  Also, if you find any
    errors, obsolete information or can suggest any additions or
    deletions, they will be most welcome.  If you can help, you have my
    thanks in advance.
         Keep BABEL on your computer or print it out and keep it on
    your desk.  Either way, you will have an outstanding reference.
    BABEL is revised three times a year, in January, May and September
    so as to keep you up-to-date.  You may download the latest version
    of BABEL from your favorite BBS or from the Internet.  See
    APPENDIX A for description of methods that may be used to obtain
    BABEL via the Internet.
         Letter groups followed with " * " were used before 1965.  At
    some of these, I have noted historical information.  For a brief
    interpretation 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 public domain.  Permission is hereby granted to
    any individual or institution to redistribute BABEL; only in its
    entirety and provided it is distributed without ANY modification
    to include this opening page, copyright notices, version information
    and format.  It may not be incorporated into any other document, or
    published, or sold (for profit or otherwise), without my written
    permission.  Any question concerning these restrictions should be
    made in writing and mailed to address shown below.
         And please remember to ECAL.
                     Irving Kind            Internet:
                     c/o K & D
                     One Church Lane
                     Baltimore, MD  21208
    Jan 1996 version = BABEL96A       Jan 1997 version = BABEL97A
    May 1996 version = BABEL96B       May 1997 version = BABEL97B
    Sep 1996 version = BABEL96C       Sep 1997 version = BABEL97C


    (TOP) (DN to B) (BOTTOM)

    AA	  Auto Answer
    AAB	  All-to-All Broadcast
    AAL	  Asynchronous Transfer Mode Adaption Layer
    AAP	  Applications Access Point [DEC]
    AAS	  All-to-All Scatter
    AASP	  ASCII Asynchronous Support Package
    AAT       Average Access Time
    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
    ABR       Available Bit Rate
    ABRS      Automated Book Request System [British Library]
    ABS       Absolute
    ABT	  Abort
    ABTS      ASCII Block Terminal Services
    AC        Automatic Computer + Alternating Current
    ACC	  Accumulator
    ACD	  Automated Call Distribution +
    	  Automatic Call Distributor
    ACDI	  Asynchronous Communications Device Interface
    ACE	  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
    ACM	  Association for Computing Machinery
    	  Audio Compression Manager [Microsoft]
    ACMS	  Application Control Management System
    ACP	  Ancillary Control Program + Auxillary Control Process
    ACROSS	  Automated Cargo Release and Operations Service System
    ACS	  Access + Access Control Set + Access Control System +
    	  Asynchronous Communication Server
    ACTS	  Automated Computer Time Service
    ACTT	  Advanced Communication and Timekeeping Technology [Seiko]
    ACU	  Automatic Calling Unit
    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
    ADD	  Automatic Document Detection [WordPerfect]
    ADF	  Automatic Document Feeder
    .ADF	  Adapter Description File (file name extension) [IBM]
    ADI	  AutoCad Device Interface (driver)
    ADL	  Address Data Latch
    ADLAT	  Adaptive Lattice Filter
    ADLC	  Adaptive Lossless Data Compression [IBM] +
    	  Asynchronous Data Link Control
    ADMACS    Apple Document Mangagement And Conrol System
    ADMD      Administrative Management Domain [X.400]
    .ADN	  Add In Utility (file name extension) [Lotus 1-2-3] [LDC]
    ADP	  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
    ADSL	  Asymmetrical Digital Subscriber Line
    ADSR	  Attack, Decay, Sustain, Release
    ADT	  Application Data Types
    ADU	  Automatic Dialing Unit
    AE	  Above or Equal
    AEB	  Analog Expansion Bus [Dialogic]
    AF	  Auxiliary carry Flag
    AFA       Accelerated File Access
    AFC       Automatic Font Change
    AFD	  Automatic File Distribution
    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	  Appletalk Filing Protocol [Macintosh]
    AFS	  Andrew File System (protocols)
    AFTP      Anonymous File Transfer Protocol
    AGC       Automatic Gain Control
    AGRAS	  Antiglare-Antireflective-Antistatic
    AI	  Analog Input + Artificial Intelligence
    AIA	  Applications Integration Architecture [DEC]
    AIC	  AIXwindows Interface Composer [IBM]
    AIF	  Audio Interchange Format
    AIIM	  Association for Information and Image Management
    AIN	  Advanced Intelligent Network [Bell Atlantic]
    AISB	  Association of Imaging Service Bureaus
    AISP	  Association of Information Systems Professionals
    AIX	  Advanced Interactive Executive [IBM]
    ALC	  Arithmetic and Logic Circuits + Automatic Level Control
    ALE	  Address Latch Enable
    ALGOL	  Algorithmic Oriented Language (see IAL)
    ALIBI	  Adaptive Location of Internetworked Bases of Information
    ALIWEB	  Archie Like Indexing in the Web [Internet]
    ALN       Asynchronous Learning Network
    ALR       Advanced Logic Research, Inc.
    ALT	  Alternate (mode)
    ALT.      Alternate lifestyle [USENET Newsgroup Category]
    ALU       Arithmetic Logic Unit
    AMANDDA   Automated Messaging and Directory Assistance
    AMD	  Active Matrix Display + Advanced Micro Devices, Inc.
    AMI       American Megatrends, Inc.
    AMMA      Advanced Memory Management Architecture [Everex Systems]
    AMPS	  Advanced Mobile Phone Service
    ANCOVA	  Analysis of Covariance
    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
    AO	  Analog Output
    AOCE	  Apple Open Collaboration Environment
    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
    API       Application Program Interface
    APIC	  Advanced Programmable Interrupt Controller [Intel]
    APIS      Advanced Passenger Information System
    APL       A Programming Language (Mathematics)
    APM	  Advanced Power Management [IBM OS2]
    .APP	  Application (file name extension) [R:Base]
    APPC	  Advanced Program-to-Program Communications [IBM]
    APPI	  Advanced Peer-to-Peer Internetworking
    APPN	  Advanced Peer-to-Peer Networking [IBM]
    APRP      Adaptive Pattern Recognition Processing
    APS       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
    ARTA      Apple Real Time Architecture
    ARTIC     A Real-Time Interface Copressor [IBM]
    ARTS	  Asynchronous Remote Takeover Server
    ARTT	  Asynchronous Remote Takeover Terminal
    ARQ	  Automatic Repeat Request
    ARU	  Audio Response Unit
    AS	  Autonomous System [Internet]
    ASAP	  As Soon As Possible +
    	  Automatic Switching And Processing
    AS3AP	  ANSI SQL Standard Scalable and Portable
    .ASC	  ASCII text (file name extension)
    ASCII	  American Standard Code for Information Interchange
    ASIC	  Application-Specific Integrated Circuit
    ASIT	  Advanced Security and Identification Technology
    ASL	  Adaptive Speed Levelling
    .ASM	  Assembler Source Language (file name extension)
    ASMP      Asymmetric Multprocessing
    ASN       Autonomous System Number
    ASP       Association of Shareware Professionals
    ASPI	  Advanced SCSI Programming Interface [Adaptec]
    ASPS	  Advanced Signal Processing System
    ASR	  Address Space Register + Automatic Send-Receive +
    	  Automatic Speech Recognition
    AST	  AST Research, Inc. (named from first initials of the
    	  founders: Albert Wong, Safi Qureshey, Thomas Yuen)
    ASYNC	  Asynchronous
    AT	  Advanced Technology + Attention
    ATA	  Advanced Technology Attachment
    ATDP	  Attention Dial Pulse
    ATDT	  Attention Dial Tone
    ATE	  Automated Test Equipment
    ATG	  Advanced Technology Group
    ATH	  Attention Hang-Up (Modem command)
    ATM	  Adobe Typeface Manager + 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)
    ATZ	  Attention Restore configuration profile from
    	  nonvolatile RAM (Modem command)
    .AU	  Audio (file name extension)
    AUDIT	  Automated Data Input Terminal
    AUI	  Attachment Unit Interface
    AUP	  Acceptable Use Policy [Internet]
    AUTO	  Automatic
    AUTOEXEC  Automatic Execution
    AUX	  Auxiliary + (First Serial Port)
    AV        Audio/Video + Audiovisual
    AVA       Audio Visual Authoring [IBM]
    AVC	  Audio Visual Connection [IBM]
    AVG	  Average
    AVI       Audio Visual Interleave [Microsoft]
    AVR	  Automatic Voice Recognition
    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]
    AX	  Architecture Extended + Automatic Transmission


    (TOP) (UP to A) (DN to C) (BOTTOM)

    BAK	  Binary Adaptation Kit [Microsoft]
    .BAK	  Backup (file name extension)
    BAL	  Basic Assembly Language
    BALUN	  Balanced Unbalanced (device)
    BAM	  Boyan Action Module
    BARTS	  Bell Atlantic Regional Timesharing
    .BAS	  Basic Language (file name extension)
    BASIC	  Beginner's All-purpose Symbolic Instruction Code
    BASM	  Built-In Assembler
    BAT	  Block Address Translation
    .BAT	  Batch Processing (file name extension)
    BBS	  Bulletin Board System
    BCC	  Block Check Character
    BCC:	  Blind Carbon Copy
    BCD	  Binary Coded Decimal
    BCL	  Batch Command Language
    BCN	  Beacon
    BCP	  Bulk Copy Program
    BCPL	  Basic Computer Programming Language
    BCR	  Byte Count Register
    BCS       Bar Code Sorter
    BDA       Bios Data Area
    BDOS	  Basic Disk Operating System
    BDR       Bus Device Request
    BE        Below or Equal
    BEL	  Bell
    BELLCORE  Bell Communications Research
    BERT	  Bit Error Rate Test/Tester
    BF	  Bad Flag
    B/F	  Background/Foreground
    BFF	  Binary File Format [IBM]
    BFT	  Binary File Transfer
    BGA       Ball Grid Array
    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
    BI	  Binary Input
    .BIB	  Bibliography (file name extension)
    BiDi	  Bi-Directional
    BIM	  Beginning of Information Marker
    .BIN	  Binary (file name extension)
    BINAC	* Binary Automatic Computer
    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
    BIX	  Byte Information Exchange (BBS)
    BIZ.      Business [USENET Newsgroup Category]
    .BK!      Backup (file name extension) [WordPerfect]
    BKSP	  Backspace
    BL	  Backlit
    BLAST	  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
    BLOS	  Branch if Lower Or Same
    BMI	  Branch if Minus
    BMIC	  BusMaster Interface Controller [Intel]
    BMP       Basic Mapping Support + Batch Message Processing Program
    .BMP	  Bitmap Picture (file name extension)
    BNC	  Bayonet Neill-Concelman (connector used with
    	  coaxial cable invented by Mr. Neill-Concelman)
    BNE	  Branch if Not Equal
    BNS       Backbone Network Service
    BO        Binary Output
    BoB	  Break-out Box
    BOC       Basic Operator Console
    BOM       Beginning Of Message
    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
    BP	  Base Pointer
    BPB	  BIOS Parameter Block
    BPI	  Bits Per Inch
    BPL	  Branch if Plus
    BPS	  Bits Per Second + Bytes Per Second
    BR	  Bad Register
    BRGC	  Binary Reflected Gray Code
    BRI	  Basic Rate Interface + Brain Response Interface
    BS        Backspace
    BSAM      Basic Sequential Access Method
    BSC	  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
    BSR	  Bit Scan Reverse
    BSS	  Block Started by Symbol
    BSV	  BASIC Bsave Graphics (file name extension)
    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
    BTOA	  Binary To ASCII
    BTP	  Batch Transfer Program
    BTR	  Bit Test and Reset
    BTS	  Bit Test and Set
    BU	  Branch Unit
    BUBL      Bulletin Board for Libraries [Janet]
    BUF       Buffer
    BWM	  Block-Write Mode
    B2X	  Binary To Hexadecimal [REXX]
    BYTE	  Binary Element String


    (TOP) (UP to B) (DN to D) (BOTTOM)

    C	  C Programming Language
    .C	  C source code (file name extension) [C]
    CA	  Collision  Avoidance
    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
    CAG	  Column Address Generator
    CAI	  Computer Aided Instruction
    CAL	  Calendar + Computer Aided Learning
    CAM	  Common Access Method + Computer Aided Manufacturing +
    	  Contents Addressable Memory
    CAN	  Cancel
    CAP       Carrierless Amplitude and Phase-Modulation +
              Central Arbitration Point +
    	  Communication Application Platform +
    	  Computer Aided Publishing
    .CAP	  Capture (file name extension)
    CAPD	  Computing To Assist Persons With Disabilities [Johns
    	  Hopkins University]
    CAPS	  Capitals (Upper Case Letters) +
    	  Cassette Programming System
    CARL	  Colorado Alliance of Research Libraries [Internet]
    CAS	  Column Address Select +
    	  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 Aided Testing + Computer Aided Tomography +
    	  Computer Aided Transcription + Concatenate
    .CAT	  Catalog (file name extension)
    CATS	  Computer Assisted Training System
    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
    CBC	  Cipher Block Chaining
    CBCR	  Channel Byte Count Register
    CBEMA	  Computer and Business Equipment
    	  Manufacturers Association
    CBGA	  Ceramic Ball Grid Array
    CBI	  Computer Based Instruction
    CBL	  Computer Based Learning
    .CBL	  COBOL source code (file name extension)
    CBMS	  Computer-Based Mail System
    CBR	  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
    CCITT     Comite Consultatif International Telegraphique et Telephonique/
              Consultative Committee for International Telegraph and Telephone
    CCL       Connection Control Language
    CCP       Console Command Processor
    CCS	  Common Command Set + Common Communications Services +
              Common Communications Support +
    	  Continuous Composite Servo
    .CCS      Color Calibration System (file name extension)
    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]
    CDC	  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
    .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
    CDOS      Concurrent Disk Operating System
    CDPD      Cellular Digital Packet Data
    CDR	  Call Detail Record + Call Detail Recording
    CD-R	  Compact Disk - Recordable
    CD-RDx	  Compact Disk - Read Only Memory Data Exchange Standard
    CDRL	  Contract Data Requirements List
    CD-ROM	  Compact Disk - Read Only Memory
    CD-RTOS   Compact Disk - Real Time Operating System
    CDS	  Current Directory Structure
    .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 +
    	  Convert Enable
    CEG	  Continuous Edge Graphics
    CEI	  Conducted Electromagnetic Interference
    CEMS	  Constituent Electronic Mail System
    CEOP      Conditional End Of Page
    CERN      The European Particle Physics Laboratory (initials
    	  originally from Conseil European pour la Recherche Nucleaire)
    CERT	  Computer Emergency Response Team
    CFB	  Cipher Feedback + Configurable Function Block
    .CFG	  Configuration (file name extension)
    CFR       Computerized Facial Recognition
    CFS       Common File System
    CFV       Call For Votes [Bitnet]
    CGA	  Color Graphics Adapter
    CGE       Common Graphics Environment
    CGI       Common Gateway Interface + Computer Generated Images +
    	  Computer Graphics Interface
    .CGM	  Computer Graphics Metafile (file name extension) +
    	  Graph (file name extension) [Lotus 1-2-3] [LDC]
    CHAP	  Challenge Authentication Protocol (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
    .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
    CIA	  Current Instruction Address
    CICS/VS   Customer Information Control System/
    	  Virtual Storage [IBM]
    CID	  Configuration/Installation/Distribution
    CIDR	  Classless Interdomain Routing
    CIF       Common Interchange/Intermediate Format +
              Customer Information Feed
    CIM       CompuServe Information Manager +
    	  Computer Integrated Manufacturing
    CIO	  Chief Information Offier
    CIOCS	  Communication Input/Output Control System
    CIP	  Command Interface Port
    CIR       Committed Information Rate
    CIRC      Circular Reference
    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
    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
    CLC	  Clear Carry Flag
    CLD	  Clear Direction Flag
    CLI	  Call-Level Interface + Clear Interrupt Flag +
    	  Command Line Interface
    CLIST	  Command List
    CLK	  Clock
    CLNP	  Connectionless Network Protocol
    CLP       Cell Loss Priority + Constraint Logic Programming
    .CLP      Clipboard (file name extension) [Windows]
    CLS	  Clear Screen
    CLTP	  Connectionless Transport Protocol
    CLTS	  Clear Task Switch Flag
    CLUI	  Command Line User Interface
    CLUT	  Color Look-Up Table [Macintosh]
    CLV	  Constant Linear Velocity
    CM	  Centimeter + Control Mark + Corrective Maintenance
    CMA	  Concert Multi-thread Architecture
    CMC	  Common Mail Calls + Common Messaging Calls +
    	  Communication Mangement Configuration +
    	  Complement Carry Flag +
    	  Computer-Mediated Communication [Internet]
    .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	  Conceptual Modelling Language +
    	  Computer Managed Learning + Current Mode Logic
    CMMS	  Computerized Maintenance Management Software
    CMMU	  Cache/Memory Management Unit [Motorola]
    CMOS	  Complementary Metal-Oxide Semiconductor
    CMOV      Conditional Move
    CMP       Compare + Computer
    CMPS	  Compare word String
    CMS	  Code Management System + Compiler Monitor System +
    	  Conversation Monitor 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 Administrator [Novell]
    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 Retrieval
    CNN       Composite Network Node
    CNSS      Core Nodal Switching Subsystem [Internet]
    .CNT      Contents (file name extension)
    CNV       Conventional (pertaining to Memory)
    CNVT	  Convert
    CNX	  Certified Network Expert
    CO	  Central Office + Command Output + Convert Out
    COB	  Chip-On-Board
    .COB	  COBAL 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
    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	  Commercial (organization Domain name) [Internet] +
    	  Common Object Model [Microsoft]
    .COM	  Command (file name extension)
    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
    COMP	  Compare + Communications
    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
    CORBA	  Common Object Request Broker Architecture
    CoREN	  Corporation for Research and Enterprise Network
    COS	  Compatible Operating System
    COSE	  Combined Office Standard Environment +
              Common Open Software/Systems Environment
    COSMIC    Computer Software Management and Information
    	  Center [NASA]
    COSMOS	  Computer System for Mainframe Operations
    COTS	  Commercial Off-The-Shelf
    CP	  Copy Protected
    CPA	  Certified Public Accountant
    CPC	  Constant Point Calculation
    CPCS	  Check Processing Control System [IBM]
    CPE	  Central Processing Element +
    	  Customer Premise Equipment +
    	  Customer Provided Equipment
    .CPE      Cover Page (file name extension)
    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]
    CPL	  Current Privilege Level
    .CPL      Control Panel (file name extension)
    CP/M      Control Program for Microcomputers
    CPS	  Characters Per Second + Cycles Per Second
    CPT	  Command Pass Through
    CPU	  Central Processing Unit
    CR	  Carriage Return
    CRAM	  Cyberspatial Reality Advancement Movement
    CRC	  Cyclic Redundancy Check
    .CRD	  Cardfile (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
    CR/LF	  Carriage Return/Line Feed
    CROM	  Control Read Only Memory
    CRT	  Cathode Ray Tube
    CRTC	  CRT Controller
    CS	  Chip Select + Clear to Send + Code Segment
    C/S	  Client/Server
    CSA	  Calendaring and Scheduling API [IBM]
    CSAR	  Channel System Address Register
    CSD	  Corrective Service Diskette [IBM]
    CSDS	  Packet Switched Data Service
    CSE	  Certified System Engineer
    CSFI      Communication Subsystem For Interconnection
    CSG       Constructive Solid Geometry +
    	  Consulting Services Group [Lotus]
    CSI	  Command Sequence Introducer + CompuServe Incorporated
    CSL	  Computer Sensitive Language
    CSLIP	  Compressed Serial Line Interface Protocol [Internet]
    CSM	  Communications Services Manager
    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 +
    	  Commercial Subroutine Package +
    	  CompuCom Speed Protocol [CompuCom]
    CSPDN	  Circuit Switched Public Data Network
    CSS	* Continuous System Simulator (Language)
    CSS	  Contact Start-Stop
    CSSM      Client-Server Systems Management [IBM]
    CSTA      Computer-Supported Telephony Applications
    CSU	  Channel Service Unit
    CSV       Comma-Separated Value/Variable +
    	  Common Services Verbs (interface) [Microsoft]
    C&T	  Chips and Technologies
    CTB	  Cipher Type Byte
    CTC       Channel To Channel
    CTCP      Client-To-Client Protocol
    CTI       Computer-Telephone Integration
    CTOS      Computerized Tomography Operating System +
              Convergent Technologies Operating System
    CTPA	  Coax-to-Twisted-Pair Adapter
    CTRL	  Control
    CTS	  Clear To Send
    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)
    CUT	  Control Unit Terminal
    CUTE	  Clarkston University Terminal Emulator
    CUU	  Cursor Up
    CVF	  Compressed Volume File
    CVGA      Color Video Graphics Array
    CVIA	  Computer Virus Industry Association
    CVT	  Convert
    CVW	  CodeView for Windows
    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]
    CYL	  Cylinder
    CYMK	  Cyan-Yellow-Magenta-Black (color model)


    (TOP) (UP to C) (DN to E) (BOTTOM)

    D/A	  Digital to Analog
    DAA	  Data Access Arrangement +
    	  Decimal Adjust for Addition
    DAC	  Data Acquisition and Control +
    	  Digital to Analog Converter
    DAD	  Desktop Application Director [Borland]
    DAI	  Distributed Artificial Intelligence
    DAL	  Data Access Language [Apple Computer] +
    	  Disk Access Lockout
    DAM	  Data Acquisition and Monitoring
    DAO	  Data Access Object [Microsoft]
    DAP	  Data Access Protocol [DEC] +
    	  Developer Assistance Program
    DARI	  Database Application Remote Interface [IBM]
    DART      Digital Audio Reconstruction Technology
    DAS       Decimal Adjust for Subtraction +
    	  Dual-Attached Station
    DASD	  Direct Access Storage Device
    DAT	  Digital Audio Tape + Disk Array Technology
    .DAT	  Data (file name extension)
    DATACOM   Data Communications
    DAV       Digital Audio-Video
    dB        Decibel
    DB	  Data Base + Data Buffer
    dBA	  Adjusted Decibel
    DBCS      Delivery Bar Code Sorter + Double-Byte Character Set
    .DBF	  Database (file name extension)
    DBIS      Dun & Bradstreet Information Services
    DBM       Data Base Manager
    DBMS	  Data Base Management System
    DBS	  Data Base Server
    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	  Direct Chip Attach Module
    DCB       Device Control Block + Disk Coprocessor Board [Novell]
    DCC	  Digital Command Control + Digital Compact Cassette +
              Direct Client Connection + Display Combination Code
    DCD	  Data Carrier Detect
    DCE       Data Circuit-Terminating Equipment +
              Data Communications Equipment +
    	  Distributed Computing Environment [OSF] +
    	  Distributed Computing Equipment
    DCF	  Data Communication Facility [IBM] +
    	  Data Compression Facility +
    	  Data Count Field [IBM] +
    	  Driver Configuration File [Lotus]
    DCI	  Display Control Interface
    DCL       Data Control Language + Declaration +
              DEC Command Language [DEC] +
    	  Device Clear + Digital Control Logic +
    	  Digital Command Language [Digital]
    DCS	  Data Collection System + Data Control System +
    	  Desktop Color Separation
    DCT	  Discrete Cosine Transform
    .DCT	  Dictionary (file name extension)
    DD	  Day + Digital Display + Double Density
    DDA       Distributed Data Access + Domain-Defined Attribute
    DDB	  Device Dependent Bitmap
    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
    DDK       Device Driver Kit [Microsoft Windows]
    DDL	  Data Definition Language + Data Description Language
    DDM	  Distributed Data Management
    DDN	  Defense Data Network
    DDS	  Digital Dataphone Service [AT&T] + Design Data Sheet +
    	  Digital Data Storage + Distributed Database Services
    DE        Device End
    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       Document Enabled Networking [Novell-Xerox]
    DES       Data Encryption Standard + Data Entry Sheet
    .DES	  Description (file name extension)
    DET	  Device Execute Trigger
    DEV	  Device
    DF	  Data Field + Destination Field + Device Flag +
    	  Double Flag
    DFC	  Data Flow Control
    DFM	  Design For Manufacturability [IBM]
    DFS	  Distributed File System
    DFSMS     Data Facility Storage Management Subsystem [IBM]
    DFT       Design For Testability + Diagnostic Funtion 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)
    DI	  Data In + Destination Index
    DIA	  Document Interchange Architecture [IBM]
    DIB	  Device Independent Bitmap +
    	  Directory Information Base
    DIBOL	  DEC Business Oriented Language
    .DIC	  Dictionary (file name extension)
    DID	  Direct Inward Dialing
    DIF	  Data Interchange Format
    DIFFSENS  Differential Sense
    DIIP	  Direct Interrupt Identification Port
    DIMM      Dual-Inline 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	  Dynamic Impedance Stabilization [CompuCom]
    DISA	  Data Interchange Standards Association
    DISP	  Displacement (offset)
    DIT	  Directory Information Tree
    DIV	  Divide
    DIVE      Direct Interface Video Extension [OS/2 Warp]
    DIW       D-Inside Wire [AT&T]
    .DIZ	  Description In Zip (file name extension)
    DL	  Download (also D/L)
    DL/1	  Data Manipulation Language 1 [IBM]
    DLC	  Data Link Control (protocol) [IBM]
    DLD       Display List Driver
    DLE       Data Link Escape
    DLL	  Dynamic Link Library
    DLM	  Dynamic Link Module
    DLP       Digital Light Processing
    DLR       DOS LAN Requester
    DLT	  Digital Linear Tape
    DM	  Distributed Memory
    DMA	  Direct Memory Access/Addressing
    DMAC	  DMA Controller
    DMD	  Digital Micromirror Device [Texas Instruments]
    DME	  Distributed Management Environment
    DMF	  Distribution Media Format [Microsoft]
    DMI	  Desktop Mangement Interface
    DML	  Data Manipulation Language
    DMM	  Digital Multimeter
    DMMS	  Dynamic Memory Management System
    DMOS	  Double-diffused Metal-Oxide Semiconductor
    DMP	  Dot Matrix Printer
    DMPC	  Distributed Memory Parallel Computer
    DMQS	  Display Mode Query and Set [IBM]
    DMS	  Data Management Software + Data Management System
    DMSD	  Digital Multistandard Decoding
    DMT       Digital Multi-Tone
    DMTF      Desktop Management Task Force
    DMY	  Day Month Year
    DN	  Down
    DNC	  Direct Numerical Control
    DNIC	  Data Network Identification Code
    DNIS	  Dialed Number Identification Service
    DNS	  Domain Naming System
    DO        Data Out + Distributed Objects
    .DOC	  Document + Documentation (file name extensions)
    DOE	  Distributed Objects Everywhere
    DO-IT	  Disabilities, Opportunities, Internetworking and
    DOMF	  Distributed Object Management Facility
    DOS	  Disk Operating System
    DOSEM	  DOS Emulation
    DOW	  Day Of Week
    DP	  Data Processing
    DPA	  Demand Protocol Architecture [3Com]
    DPAM	  Demand Priority Access Method
    DPAREN	  Data Parity Enable [IBM]
    DPB	  Drive Parameter Block
    DPC	  Direct Program Control
    DPI	  Dots Per Inch
    DPL	  Descriptor Privilege Level
    DPM	  Digital Panel Meter
    DPMA	  Data Processing Management Association
    DPMI	  DOS Protected Mode Interface [Microsoft]
    DPMS	  Display Power Management Support
    DPO	  Data Phase Optimization
    DPS	  Document Processing System
    DPSK	  Differential Phase Shift Keying
    DPtoTP	  Display Coordinates to Tablet Coordinates
    DQL	  DataEase Query Language [DataEase International]
    DR	  Data Received
    D/R	  Direct or Reverse
    DRAM	  Dynamic Random Access Memory
    DRAW	  Direct Read After Write
    DR.BOND   Dial-up Router Bandwith On Demand [NEC]
    DRDA	  Distributed Relational Database Architecture [IBM]
    DR-DOS	  Digital Research-Disk Operating System
    DRDW	  Direct Read During Write
    DRI	  Digital Research Incorporated
    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
    DSA	  Directory System Agent
    DSAP	  Destination Service Access Point
    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)
    DSIS	  Distributed Support Information Standard
    DSL	  Dynamic Simulation Language
    DSMA	  Digital Sense Multiple Access
    DSOM	  Distributed System Object Model
    DSP	  Digital Signal Processing +
    	  Digital Signal Processor
    DSQD	  Double Sided, Quad Density (diskette)
    DSR	  Data Set Ready + Device Status Register +
    	  Device Status Report
    DSS       Decision Support System + Digital Signature Standard
    DSSS	  Direct-Sequence Spread Spectrum
    DSTN	  Double Supertwisted Nematic
    DSU	  Data Service Unit + Digital Service Unit
    DSVD      Digital Simultaneous Voice and Data
    DSW	  Data Status Word + Device Status Word
    D2T2	  Dye Diffusion Thermal Transfer (printing)
    DTA	  Disk Transfer Area
    .DTA	  Data (file name extension)
    DTD	  Document Type Definition
    DTE	  Data Terminal Equipment + Dumb Terminal Emulator
    DTF       Distributed Test Facility
    DTL       Dialog Tag Language [IBM] + Diode-Transistor Logic
    DTMF      Data Tone Multiple Frequency + Dual Tone Multifrequency
    DTP       Desktop Publishing + Distributed Transaction Process
    DTR	  Data Terminal Ready + Data Transfer Rate
    DTV	  Desktop Video
    DTVC	  Desktop Video Conferencing
    DU	  Disk Usage
    DUA	  Directory User Agent
    DUAT	  Direct User Access Terminal
    .DV	  DESQview Script (file name extension)
    DVC       Desktop Video Conferencing
    DVE       Digital Video Effect
    DVI	  Digital Video Interactive
    .DVI	  Device Independent (file name extension)
    DVMRP	  Distance Vector Multicast Routing Protocol [Internet]
    .DVR	  Device Driver (file name extension) (Also see .DRV)
    DWG	  Drawing
    D2X	  Decimal To Hexadecimal [REXX]
    .DXB	  Drawing Interchange Binary (file name extension)
    DXC	  Data Exchange Control
    DXF	  Drawing Exchange Format


    (TOP) (UP to D) (DN to F) (BOTTOM)

    EA        Effective Address + Extended Attribute [OS/2]
    EAR	  External Access Register
    EARN	  European Academic Research Network
    EAROM	  Electrically Alterable Read Only Memory
    EARS	  Electronic Access to Reference Services
    EATA	  Enhanced AT Bus Attachment
    EBC	  EISA Bus Controller
    EBCDIC	  Extended Binary Coded Decimal Interchange Code [IBM]
    EBI	  Equivalent Background Input +
    	  Extended Background Investigation
    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	  Error Check Code + Error Checking and Correction +
    	  Error Correction Code
    ECD	  Enhanced Color Display
    ECHO	  European Commission Host Organization [Internet]
    ECI       External Call Interface
    ECL       Emitter Coupled Logic
    ECM	  Electronic Control Module
    ECMA	  European Computer Manufacturers Association
    ECNE	  Enterprise Certified NetWare Engineer [Novell]
    ECP	  Enhanced Capabilities Port [Microsoft]
    ECTL	  Electronic Communal Temporal Lobe
    ECU	  EISA Configuration Utility
    ED	  Erase Display
    EDA	  Embedded Document Architecture [Go Corporation]
    EDC	  Enhanced Data Correction +
    	  Error Detection and Correction
    EDDC	  Extended Distance Data Cable
    EDGAR	  Electronic Data Gathering, Analysis and Retrieval
    EDI	  Electronic Data Interchange +
    	  Electronic Document Interchange [DEC]
    EDIFACT   EDI for Administration Commerce and Transport
    EDL       Edit Decision List
    EDLC      Ethernet Data Link Control
    EDLIN	  Editor (Line Text)
    EDM       Electronic Document Management
    EDO       Extended Data Out
    EDOS	  Enhanced DOS for Windows
    EDP	  Electronic Data Processing
    EDPM	  Electronic Data Processing Machine
    EDRAM	  Extended Dynamic Random Access Memory
    EDSAC	* Electronic Delay Storage Automatic Computer
    EDSI	  Enhanced Small Device Interface
    EDU	  Education (organization 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
    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
    EFL	  Emitter Follower Logic
    EFTS	  Electronic Funds Transfer System
    EGA	  Enhanced Graphics Adapter
    EGP	  Exterior/External Gateway Protocol
    EHLLAPI   Emulator High Level Language Application
    	  Programming Interface [IBM]
    EIA	  Electronic Industries Association
    EIDE	  Enhanced Integrated Drive Electronics
    EIS	  Executive Information System
    EISA	  Extended Industry Standard Architecture
    EL	  Electroluminescent (display) + Erase Line
    ELC       Embedded Linking and Control
    ELF       Extremely Low Frequency
    ELS	  Entry Level System
    EM        Electronic Mail + Emphasized + End of Medium +
              Expanded Memory
    EMA	  Electronic Mail Association +
    	  Enterprise Management Architecture
    EMACS	  Editing Macros [Unix]
    E-MAIL	  Electronic Mail
    EMB	  Extended Memory Block [LIM/AST]
    EMBARC	  Electronic Mail Broadcast to a Roaming Computer
    EMC	  Electromagnetic Compatibility + E-Mail Connection +
    	  Extended Math Coprocessor
    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 +
    	  Expanded Memory Specification [LIM]
    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 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
    EOSDIS	  Earth Observing System Data and Information System [NASA]
    EOT	  End Of Table + End of Tape (marker) + End of Text +
    	  End of Transmission
    EP        Electrophotographic Engine
    EPL       Effective Privilege Level
    EPLD	  Electrically Programmable Logic Device
    EPM	  Enhanced Editor for Presentation Manager [IBM] +
    	  Enterprise Process Management [IBM]
    EPP	  Enhanced Parallel Port
    EPROM	  Electrically Programmable Read Only Memory +
    	  Erasable Programmable Read Only Memory
    .EPS	  Encapsulated PostScript (file name extension)
    EPSF	  Encapsulated PostScript Files
    ERAS	  Electronic Routing and Approval System [Hughes Aircraft]
    ERIC	  Educational Resources Information Center [Internet]
    ERLL	  Enhanced Run Length Limited
    EROM	  Erasable Read Only Memory
    EROS	  Earth Resources Observation System [U.S. Geological Survey]
    ERR	  Error
    ER/RC	  Extended Result/Response Code
    ES	  Extra Segment
    ESA	  Enterprise Systems Architecture [IBM] +
    	  European Space Agency
    ESC	  EISA System Component + Escape
    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
    ESDI	  Enhanced Small Device Interface
    ESI	  Enhanced Serial Interface (specification) [Hayes]
    ESN	  Electronic Security Number
    ESP	  Emulation Sensing Processor +
    	  Enhanced Serial Port [Hayes] +
    	  Estimated Selling Price
    ESR       Event Service Routine
    ESS       Electronic Switching System
    ESU	  Electro-Static Unit