A
A-D Analog to Digital
AA Author's Alteration
AA Auto Answer
AAL5 ATM Adaption Layer 5
ABEND Abnormal End
ABI Application Binary Interface
ABR Available Bit Rate
AC97 Audio Codec 97
ACB Access method Control Block
ACDS Active Control Data Set ACE Asynchronous Communications
Element
ACF Advanced Communication Facility
ACIA Asynchronous Communications Interface Adapter
ACK Acknowledge
ACS Asynchronous Connection Server
ACS Automatic Class Selection
ACSE Application Control Service Element
ACT Application Control Table
ACU Automatic Calling Unit
ADC Analog Digital Converter
ADDMD Administrative Directory Management Domain
ADMD Administrative Management Domain
ADO ActiveX Data Object
ADSL Asymetric Digital Subscriber Line
AEA Activity End Acknowledge
AEI Application Entity Invocation
AF Application Framework
AFP Advanced Function Printing
AGP Accellerated Graphics Port
AGS Advanced Graphics System
AI Artificial Intelligence
AIU Application Interface Unit
AIX Advanced Interactive eXecutive
AIX Alternate IndeX
ALGOL ALGOrithmic Language
ALS Application Layer Structure
ALS Automatic Line Switching
ALT Application Load Table
ALU Arithmetic and Logic Unit
AM Access Method
AMH Automated Material Handling
AMI Alternate Mark Inversion
AMIS Audio Messaging Interchange Specification
AMR Audio Modem Riser
AMS Access Method Services
ANR Automatic Network Routing
ANS Advanced Network Services
ANSI American National Standards Institute
AOCE Apple Open Collaboration Environment
AOW Asian and Oceanic Workshop for open systems
AP Access Point
AP Automation Protocol
APA All Points Addressable
APDU Application Protocol Data Unit
API Application Programming Interface
APIA API Association
APL A Programming Language
APPC Advanced Program-to-Program Communication
APPI Advanced Peer-to-Peer Internetwork(ing)
APPN Advanced Peer-to-Peer Network(ing)
APS Advanced Production System
AR Attention Routine
ARP Address Resolution Protocol
ARPA Advanced Research Projects Agency
ARPANET Advanced Research Projects Agency Network
ARU Audio Response Unit
AS Activity Start
AS Autonomous System
ASC Accredited Standards Committee
ASCII American Standard Code for Information Interchange
ASE Application Service Element
ASIC Application-Specific Integrated Circuit
ASN Abstract Syntax Notation
ASN.1 Abstract Syntax Notation One
ASO Application Service Object
ASP Active Server Pages
ASR Automatic Speech Recognition
ASTs Asynchronous System Traps
AT Advanced Technology
ATM Adobe Type Manager
ATM Asynchronous Transfer Mode
ATM Automatic Teller Machine
ATMP Ascend Tunnel Management Protocol
ATSF Alert Transport Service Facility
AU Access Unit
AVR Automatic Volume Recognition
AWG American Wire Gauge
Top
B
B8ZS Binary Eight Zero Substitution
BABT British Approvals Board for Telecommunications
BAL Business Application Language
BAM Basic Access Methods
BAS Basic Activity Subset
BASH Bourne-Again SHell
BASIC Beginners All-Purpose Symbolic Instruktion Code
BBS Bulletin Board System
BCC Block Check Character
BCD Binary Coded Decimal
BCF Bridge Control Facility
BCPL Basic Combined Programming Language
BCS Basic Catalog Structure
BCS Basic Combined Subset
BDAM Basic Direct Access Method
BDR Basic Density Range
BEL Bell
BER Bit Error Rate
BES Bursty Errored Seconds
BG BackGround
BHT Branch History Table
BIOS Basic Input/Output System
BIS Business Information System
BISYNC Binary Synchronous Communication
BIT Binary Digit
BITNIC Bitnet Network Information Center
BLOB Binary Large Object
BMIC Bus Master Interface Controller
BMP BitMaP
BMS Basic Mapping Support
BNN Boundary Network Node
BOC Bell Operating Companies
BOT Begin Of
Tape
BP Base Pointer
BPAM Basic
Partitioned Access Method
BPI Bytes Per Inch
BPS Bites Per Second
BRA Basic Rate Access
BRI Basic Rate Interface
BS Backspace / British Standard
BSA Basic Service Area
BSAM Basic Sequential Access Method
BSC Binary Synchronous Communication
BSD Berkeley Software Distribution
BSDS BootStrap Data Set
BSI British Standards Institute
BSS Basic Synchronous Subset
BTAC Branch Target Address Cache
BTAM Basic Teleprocessing Access Method
BTA-ES Basic Teleprocessing Access Method - Extended Storage
BYP Bypass
Top
C
CA Collision Avoidance
CA Computer Aided
CAA Computer Aided Architecture
CAD Computer Aided Design
CADD Computer Aided Design and Drafting
CADIS Computer Aided Design Interactive System
CAE Common Application Environment
CAE Computer Assisted Education, Computer Aided Engineering =
CAD + CAP + CAQ
CAH Computer Aided Handling
CAI Computer Aided Instruction = CIM + CAO
CAISE Computer Aided Integrated Software Engineering
CALS Computer Aided Acquisition and Logistic Support
CAM Computer Aided Manufacturing / Content Adressable Memory
CAMAC Computer Automated MeAsurement Control CAN Cancel
CAO Computer Aided Office
CAP Computer Aided Planning / Computer Aided Publishing
CAPP Computer Aided Production Planning
CAPPC Computer Aided Production Planning and Control
CAPSC Computer Aided Production Scheduling and Control
CAQ Computer Aided Quality Assurance
CAR Computer Aided Roboting
CAR Computer Assisted Radiology
CAS Computer Aided Selling
CASE Common Application Service Elements
CASE Computer Aided Software-Engineering
CAT Computer Aided Testing
CATV CAble TeleVision
CBDS Connectionless Broadband Data Service
CBEMA Computer and Business Equipment Manufacturers'
Association
CBR Constant Bit Rate
CBT Computer Based Training
CCD Charge-Coupled Device
CCETT Centre Commun d'Etudes de Telediffusion et
Telecommunications
CCIR International Radio Consultative Committee
CCITT Comite Consultatif International Telegraphique et
Telephonique
CCR Committment, Concurrency and Recovery
CCS Common Communication Support
CCTA Central Computer and Telecommunications Agency
CCU Communication Control Unit
CCW Channel
Command Word
CD Collision Detection
CD Compact Disk
CDB Command Descriptor Block
CDC Century Date Change
CDDA Compact Disk - Digital Audio
CDDI Copper Data Distribution Interface
CDE Common Desktop Environment
CDG Compact Disk - Graphic
CDI Compact Disk Interactive
CDMA Code Division Multiple Access
CDPD Cellular Digital Packet Data
CDR Copy Density Range
CDROM Compact Disk ROM
CDTV Commodore Total Vision
CDXA Copmact Disk eXtended Architecture
CEC Commission of European Communities
CEFIC Conseil Européen des Federations de l'Industrie Chimique
CELP Code Excited Linear Prediction
CEN Comité Européen de Normalisation
CENELEC Comité Européen de Normalisation Electrotechnique
CEO Comprehensive Electronic Office
CEPT Conference Européenne des Administrations des Postes et
des Telecommunications
CERN Conseil Européen pour la Recherche Nucléaire CF Call
Forwarding
CF Carry Flag
CF Control Function
CFV Call For Votes
CGA Colour Graphics Adapter
CGI Common Gateway Interface
CGI Computer Graphics Interface
CGM Computer Graphics Metafile
CHAP Challenge-Handshake Authentication Protocol
CHL-I CHanneL Interface
CHPID CHannel Path IDentifier
CI Computer Interconnect
CI Control Interval
CIAM Computer Integrated and Automated Manufacturing
CIB Computer Integrated Business
CICS Customer Information Control System
CID Configuration, Installation and Distribution
CIF Cells In Frames
CIF Common Intermediate Format
CIF Computer Integrated Factory = CIO + CIM
CIM Computer Input by Microfilm CIM Computer Integrated
Manufacturing = PPS + CAE + CAM
CIO Computer Integrated Office
CIR Committed Information Rate
CIS Card Information Structure
CISC Complex (Complete) Instruction Set Computer
CIT Computer Integrated Telephony
CIV Conversation Verb Interface
CKD Count Key Data
CL Core Image Library CL Connectionless
CLI Call Level Interface
CLIM Compaq/Lotus/Intel/Microsoft
CLNS Connectionless Network Service
CM/2 Communication Manager / 2
CMC Communication Management Configuration CMEA Council for
Mutual Economic Assistance
CMIP Common Management Information Protocol
CMIS Common Management Information Service
CMOS Cellular Management Operation System
CMOS Complimentary Metal Oxide Semiconductor
CMOT Common Management Information Protocol (CMOT) Over TCP/IP
CMR Communications Resource Manager
CMS Conversational Monitor System
CMYK Cyan, Magenta, Yellow, Black
CN Corporate Network
CNC Computerized Numerical Control
CNLP Connectionless Network Protocol
CNM Communication Network Management
CNMA Communication Network for Manufacturing Applications
CNR Carrier-to-Noise-Ratio
COBOL COmmon Business Oriented Language
COCOM Coordinating Comittee on Multilateral Export Controls
CODASYL COnference on DAta SYstems Languages Codec
Coder/Decoder
COFF Common Object File Format
COM Common Object Model
COM Computer Output on Microfilm
COMAL COMmon Algorithmic Language
COMREG Communication Region
CONS Connection-Oriented Network Service
CORBA Common Object Request Broker Architecture
COS Corporation for Open Systems
COSE Common Open Software Environment
COSINE Cooperation for OSI Networking in Europe
COSS Cross Operating System Service
CP Control Program
CP-SVR Control Point to Server
CP/M Control Program/Monitor (for Microcomputer)
CPE Customer Premises Equipment
CPI Characters Per Inch
CPI Common Programming Interface
CPI Computer to PABX Interface
CPIC Common Programming Interface for Communications CPL
Current Privilege Level
CPR Computerized Patient Record
CPS Characters Per Second
CPU Central Processing Unit
CR Carriage Return
CR Communication Region
CRC Cyclic Redundancy Check
CRJE Conversational Remote Job Entry
CRS Computer Reservation System
CRS Configuration Report Server
CRT Cathode Ray Tube
CS Communications Server
CSA Common System Area
CSC Cross System Consistency
CSDN Circuit Switched Data Network
CSECT Control Section
CSI Consolidated Software Inventory
CSLIP Compressed SLIP
CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
CSMA/CD Carrier Sense Multiple Access with Collision Detection
CSP Control Sequence Prefix
CSP Cross System Product
CSPDN Circuit Switched Public Data Network
CSS Cascading Style Sheet
CST Computer Supported Telephony
CSU Channel Service Unit
CSU/DSU Channel Service Unit / Data Service Unit
CT Continuous Tone
CT2T Continuous Tone To Tape
CTC Channel To Channel
CTC CICS To CICS
CTS Clear To Send
CTS Conformance Test System
CTS-WAN Conformance Testing Services for WAN
CU Control Unit
CUA Common User Access
CUT Control Unit Terminal
CVOL Control VOLume
CWS Coalition for Working Systems
Top
D
D/A Digital/Analog
DA Desk Accessory
DAC Digital Analog Converter
DAC Dual Attachment Concentrator
DAI Distributed Artificial Intelligence
DAM Direct Access Method
DAP Directory Access Protocol
DAP Document Application Profile
DARPA Defense Advanced Research Projects Agency
DAS Dual Attachment Station
DASD Direct Access Storage Device
DAT Digital Audio Tape
DAT Dynamic Address Translation
DB Database
DBCS Double Byte Character Set
DBMS DataBase Management System
DBRT Directed Beam Refresh Terminal
DC Data Cartridge
DC Data Communication
DCA Document Content Architecture
DCAF Distributed Console Access Facility
DCB Data Control Block
DCB Disk Coprocessor Board
DCC Diskette Controller Chip
DCE Data Circuit terminating Equipment
DCE Data Communications Equipment
DCE
Distributed Computing Environment
DCI Display Control Interface
DCL Digital Command Language
DCS Desktop Color Separation
DCT Destination Control Table
DCT Discrete Cosine Transform
DD Data Definition
DDCMP Digital Data Communications Message Protocol
DDCS Distributed Database Connecion Services/2
DDE Dynamic Data Exchange
DDES Digital Data Exchange Specifications
DDI Device Driver Interface
DDK Driver Development Kit
DDL Data Definition Language
DDL Document Description Language
DDM Distributed Data Management
DDN Defense Data Network
DDP Distributed Data Processing
DDRM Device driver interface/Driver kernel interface Reference
Manual
DDS Dataphone Digital Service
DDS Decision Support System
DECT Digital European Cordless Telephone
DECUS Digital Equipment Computer Users Society
DEL Delete
DES Data Encryption Standard
DF Direction Flag
DFC Distributed Coordination Function
DFDSS Data Facility Data Set Services
DFHSM Data Facility Hierarchical Storage Manager
DFP Data Facility Product
DFR Document Filing and Retrival
DFS Distributed File System
DFSMS Data Facility Storage Management Subsystem
DFSORT Data Facility Sort
DFT Distributed Function Terminal
DFWMAC Distributed Foundation Wireless Media Access Control
DHCP Dynamic Host Configuration Protocol
DHTML Dynamic HTML
DIA Document Interchange Architecture
DIB Data Input Bus DIB Device Independent Bitmap
DIFS Distributed coordination function InterFrame Space
DIMM Dual Inline Memory Module
DIP Dual Inline Package
DIS Draft International Standard
DISSOS Distributed Office Support System
DIT Directory Information Tree
DKI Driver Kernel Interface
DL Data Length
DL Directory Listing
DL/1 Data Language 1
DLBL Disk Label
DLCI Data Linc Connection Identifier
DLE Data Link Escape
DLL Dynamic Link Library
DLS Device Level Selection
DLSE Device Level Selection Enhanced
DLSw Data Link Switching
DLUR Dependent LU Requester
DLUR/S Dependent LU Requester / Server
DLUS Dependent LU Server
DMA Direct Memory Access
DMCI Direct Memory Communications Interface
DMD Directory Management Domain
DMI Digital Multiplexed Interface
DML Data(base) Manipulation Language
DMNL Direct Multi Network Link
DMP Dot Matrix Printer
DN Distinguished Name
DNA Digital Network Architecture
DNS Domain Name Service
DOC Display Operator Console
DOE Distributed Objects Everywhere
DOMF Distributed Object Management Facility
DOS Declaration Of Support
DOS Disk Operating System
DOS/VS Disk Operating System / Virtual Storage
DOS/VSE Disk Operating System / Virtual Storage Extended
DP Data Processing
DP Draft Proposal
DPA Document Printing Application
DPF Data Private Facility
DPI Dots Per Inch
DPL Descriptor Privilege Level
DPMS Display Power Management Signaling
DPS Dynamic Path Selection
DQDB Distributed Queue Dual Bus
DRAM Dynamic Random Access Memory
DRQ Data ReQuest
DS Digit Select
DS Directory System
DSA Directory System Agent
DSA Distributed Systems Architecture
DSA Dynamic Storage Area
DSF Device Support Facility
DSL Direct Swift Link
DSN DataSetName
DSN Distributed Systems Network
DSNL Direct Swift Network Link
DSOM Distributed System Object Model
DSP Digital Signal Processor
DSP Directory System Protocol
DSR Data Set Ready
DSSI Digital Storage Systems Interconnect
DSU Data Service Unit
DTAM Document Transfer, Access and Manipulation
DTD Document Type Definition
DTE Data Terminal Equipment
DTI Department of Trade and Industry (UK)
DTP DeskTop Publishing
DTR Data Terminal Ready
DU Data Unit
DUA Directory User Agent
DUN Dispatch Unit Number
DVI Digital Video Interface
DVST Direct View Bistable Storage
DXI Data eXchange Interface
Top
E
E1 2,048 Mbps
E3 34 Mbps
EARN European Academic and Research Network
EB Error Bell
EB ExaByte (1,152,921,504,606846,976 bytes)
EBAM Electronic Beam-Addressable Memory
EBCD Extended Binary Coded Decimal
EBCDIC Extended Binary Coded Decimal Interchange Code
ECC Error Checking and Correction
ECC Error Correction Code
ECE Economic Commission for Europe
ECF Enhanced Connectivity Facility
ECITC European Committee of IT Testing and Certification
ECKD Extended Count-Key Data
ECMA European Computer Manufacturers Association
ECTUA European Counsil for Telecommunications Users
Association
EDC Enterprise Database Connectivity
EDF Execution Diagnostic Facility
EDG Electronic Dot Generation
EDI Electronic Data Interchange
EDICON EDI Community for the Construction Industry (UK)
EDIF Electronic Design Interchange Format
EDIFACT Electronic Data Interchange For Administration,
Commerce and Transport
EDIM Electronic Data Interchange Message
EDIMS EDI Messaging System
EDM Engineering Data Management
EDP Electronic Data Processing
EDR Early Device Release
EEMA European Electronic Mail Association
EFT Electronic Funds Transfer
EGA Enhanced Graphics Adapter
EGP Exterior Gateway Protocol
EHLLAPI Emulator High Level Language Applications Programming
Interface
EIB Execute Interface Block
EIP Execute Interface Program
EISA Extended Industry Standard Architecture
EIT Encoding Information Type
EIUF European
ISDN User Forum
ELAN European LAN
ELAN Extended LAN
ELAN Emulated LAN
EM End of Medium
EMA Enterprise Management Architecture
EMS Expanded Memory Specification
EMUG European MAP Users Group
EN European Norme
ENE Enterprise Network Event
ENP Enable Presentation
ENQ Enquiry
EO Eight Ones
EOB End of Block
EOC End of Cylinder
EOF End of File
EOJ End of Job
EOP End of Procedure
EOT End of Transmission
EOV End of Volume
EP Emulation Program
EPDE Electronic Product Data Exchange
EPOW Emergency Power Off Warning
EPROM Eraseable Programable Read Only Memory
EPS Encapsulated PostScript
EPSF Encapsulated PostScript Format
ER Entity Relationship
ERDS Error Recording Data Set
EREP Environmental Record Editing and Printing program
ES Errored Second
ESA Extended Service Area ESC Escape
ESCON Enterprise System Connection Architecture
ESD Electronic Software Distribution
ESD External Symbol Dictionary
ESDI Enhanced Small Device Interface
ESDS Entry Sequenced Data Set
ESF Extended SuperFrame
ESPRIT European Strategic Programme for Research and
development in Information Technology
ESQA Extended System Queue Area
ETB End of Transmission Block
ETCOM European Testing and Certification for Office and
Manufacturing protocols
ETS European Telecommunication Standard
ETSI European Telecommunication Standards Institute
ETX End of Text
EUnet European Unix Network
EUUG European Unix User Group
EVI EVent Information
EWOS European Workshop for Open Systems
EXCP EXecute Channel Program
EZ Excessive Zeros
Top
F
F/STP Foil STP
FA Foreign Agent
FAQ Frequently Asked Questions
FAST Federation Against Software Theft
FAT File Allocation Table
FBA Fix Block Architecture
FBA Fixed Blocked ANSI-defined printer control characters
FBM Fix Block Modus
FC File
Control
FCB Format Control Buffer
FCP File Control Program
FCS Frame-Check Sequence
FCT File Control Table
FDD Fixed Disk Drive
FDDI Fiber Distributed Data Interface
FEAL Fast Data Encipherment Algorithm
FEP Front-End Processor
FF Formfeed
FH Frame Handler
FIFO First In, First Out
FIPS Federal Information Processing Standard
FLOPS Floating-point operations per second
FMLI Forms and Menu Language Interpreter
FOB Form Overlay Buffer
FOND Font family descriptor
FORTRAN FORmula TRANslator
FPU Floating Point Unit
FRAD Frame Relay Access Device
FROM Factory ROM
FRU Field Replaceable Unit
FS Field Separator
FS File Separator FSB Front Side Bus
FSF Free Software Foundation
FSK Frequency Shift Keying
FT Fault Tolerant
FTAM File Transfer and Access Method
FTP File Transfer Protocol
FTP Foil Twisted Pair
FTTC Fibre To The Curb
FTTH Fibre To The Home
FTTP Fibre To The Building
FUP Funktionsplan
Top
G
GAL Global Address List
GATF Graphic Arts Technical Foundation
GB GigaByte (1,073,741,824 bytes)
GCR Group Coded Recording
GDG Generation Data Group
GDS Global Directory Service
GDT Global Descriptor Table
GDTR Global Descriptor Table Register
GE Graphic Escape
GETVIS GET VIrtual Storage
GID Group ID
GIF Graphics Interchange Format
GIS Generalized Information System
GIX Global Internet Exchange
GKS Graphical Kernel System
GML Generalized Markup Language
GOSIP Government OSI Profile
GP General Protection
GPIB General-Purpose Interface Bus
GRS Global Resource Serialization
GS Group Separator
GTF Generalized Trace Facility
GUI Graphical User Interface
GUIP Graphical User Interface for Blind people
GUUG German Unix User Group
Top
H
H&J Hyphenation and Justification
HA Home Address
HA Host Agent
HADA High Availability Disk Array
HCL Hue, Chroma, and Luminance
HDA Head-Disk Assembl
HDBV Host Data Base View
HDLC High Level Data Link Communications
HDSL High-bit rate Digital Subscriber Loop
HDTV High Definition TV
HE High End (system)
HGC Hercules Graphics Card
HIC Host Interface Computer
HLL High Level Language
HLS Hue-Lightness-Saturation
HMD Head-Mounted Display
HMMP HyperMedia Management Protocol
HMMS HyperMedia Management Schema
HPCL Hewlett-Packard Control Language
HPFS High Performance File System
HPGL Hewlett-Packard Graphical Language
HPR High Performance Routing
HR Horizontal Rule
HSB Hue-saturation-brightness
HSELAN High Speed ELAN
HSI Hue-Saturation-Intensity
HSLAN High Speed LAN
HSSI High Speed Serial Interface
HSV Hue-Saturation-Value
HT Horizontal Tab
HTML Hypertext Markup Language
HTTP Hypertext Transfer Protocol
Hz Hertz
Top
I
I-Net Intranet I/O Input/Output I/O Input/Output IA5
International Alphabet Five
IAB Internet Activities Board
IC Integrated Circuit
ICEM Integrated Computer Engineering and Manufacturing
ICMP Internet Control Message Protocol
ID Identifier
IDA Indirect Data Addressing
IDA Intelligent Drive Array
IDE Integrated Drive Electronics
IDEA International Data Encryption Algorithm
IDL Interfacce Definition Language
IDT Interrupt
Descriptor Table
IEC InterExchange Carrier
IEEE Institute of Electrical and Electronic Engineers IETF
Internet Engineering Task Force
IF Interrupt Flag
IFF Interchange File Format
IFIP International Federation of Information Processing
IFS Interchange File Separator
IFS InterFrame Space
IGES Initial Graphics Exchange Specification
IGMP Internet Group Membership Protocol
IGS Interchange Group Separator
II Interactive Interface
IISP Interim Interswitch Signaling Protocol
IKT Informatione- und Kommunikationstechnik
ILC InterLanguage Communication
IML Initial Microcode Load
IMPL Initial Microprogram Load
IMR Interrupt Mask Registers
IMS Information Management System
IMS/VS Information Management System / Virtual Storage
INP Inhibit Presentation
INT INTerrupt
IOC ISDN Ordering Code
IOCP Input/Output Configuration Program
IOCS Input/Output Control System
IOGEN Input/Output device GENeration
IOPL Input/Output Privilege Level
IOS Input/Output Supervisor
IP Internet Protocol
IPL Initial Program Load
IPM InterPersonal Message
IPSE Integrated Project Support Environment
IPX Internet Packet Exchange
IR Index Return
IRC Internet Relay Chat
IRDS Information Resource Dictionary System
IRQ Interrupt ReQuest
IRS Interchange Recors Separator
IS Information System
IS Intermediate System
IS International Standard
ISA Industry Standard Architecture
ISAM Indexed Sequential Access Method ISDN Integrated Services
Digital Network
ISFMS Indexed Sequential File Management System
ISMF Interactive Storage Management Facility
ISO International Standardization Organisation
ISO IEC ISO International Electrotechnical Commitee
ISODE ISO Development Environment
ISP Internet Service Provider
ISPF Interactive System Produvtivity Facility
ISPF/PDF ISPF Program Development Facility
ISR Information Storage and Retrieval
ISR Intermediate Session Routing
ISSE Intel SIMD Sreaming Extension
ISV Independent Software Vendor
IT Indent Tab
ITB Intermediate Transmission Block
ITLD International Top-Level Domain
ITRC Information Technology Requirements Council
ITU International Comunication Union (ehem. CCITT)
ITV Interactive TeleVision
IUS Interchange Unit Separator
IWS Intelligent WorkStation
Top
J
JCC Job Control Command
JCL Job Control Language
JCS Job Control Statement
JCT JES Control Table
JCT Journal Control Table
JECL Job Entry Control Language
JEIDA Japan Electronics Industry Development Association
JES Job Entry Subsystem
JPEG Joint Photographic Experts Group
Top
K
K Kilobyte
KB KiloByte (1,024 Bytes) KBPS
KiloBits Per Second
kHz KiloHertz
KIP Kinetics Internet Protocol
KIPS Kilo Instructions per second
KL Key Length
KOPS Kilo Operations per second
KSDS Key Sequenced Data Set
KVA KiloVolt Ampere
Top
L
L2F Layer 2 Forwarding
L2TP Layer 2 Tunneling Protocol
LAN Local Area Network
LAPS LAN Adapter Protocol Support Program
LBL Label
LCD Liquid Crystal Display
LCS Lotus Communication Server
LDAP Lightweight Directory Access Protocol
LDMF Librarian Disc Master File
LDS Linear Data Set
LDT Local Descriptor Table
LE Low End (system)
LEC LAN Emulation Client
LEC Local Exchange Carrier
LED Light Emitting Diode
LF Linefeed
LIC Line Interface Computer
LIFO Last In, First Out
LILO Last In, Last Out
LILO Linux Loader
LIM-EMS Lotus Intel Microsoft EMS
LIOCS Logical Input/Output Control System
LISP List Programming
LLC2 Logical Link Control Layer 2
LOC Lines Of Code
LOS Local Operator System
LPI Lines Per Inch
LRC Longitudinal Redundancy Checking
LRU Least Recently Used
LSD Least Significant Digit
LSI Large Scale Integration -> VLSI
LU Logical Unit
LUB Logical Unit Block
LUT Look Up Table
LVT Light Valve Technology
LW Line Work
LZ Lempel-Ziv
LZW Lempel-Ziv-Welch
Top
M
MAC Media Access Control
MAN Metropolitan Area Network
MAP Maintenance Analysis Procedure
MAP Manufacturing Automation Protocol
MAPI Messaging Applications Programming Interface
MB MegaByte (1,048,576 bytes)
MBCS Multiple Byte Character Set
MBONE Multicast Backbone
MBPS MegaBits Per Second
MCA Micro Channel Architecture
MCBF Mean Cycles Between Failures
MCCOI Multimedia Communications Community of Interest
MCGA MultiColour Graphics Array
MCI Media Control Interface
MD Management Domain
MD5 Message Digest 5
MDA Monochrome Display Adapter
MEB Memory Expansion Board
MFA Modify Field Attribute
MFC Microsoft Foundation Classes
MFKS Multifunktionales Konferenzsystem
MFLOPS Million Floating-Point Operations Per Second
MFM Modified Frequency Modulation
MFV Multi File Volume
MFWS MultiFunction WorkStation
MGA Monochrome Graphic Adapter
MH Mobile Host
MHS Message Handling System
MI Multiple Inheritance
MIB Management Information Database
MICR Magnetic Ink Character Reader
MIDI Musical Instrument Digital Interface
MIME Multipurpose Internet Mail Extensions
MIPS Millions of Instructions Per Second
MISC Minimum Instruction Set Computer -> CISC, RISC
MLPPP MultiLink PPP
MMDF Multi-Channel Memorandum Distribution Facility
MMDS Multi-Megabit Data Services
MMFS Manufacturing Manage Format Standard
MMX Multi Media eXtensions
MNP Microcom Network Protocol
MODEM MOdulator/DEModulator
MOPS Mega Operations per second
MOTIS Message-Oriented Text Interchange Systems
MP Multiprocessing
MPC Multimedia PC
MPEG Motion Picture Experts Group
MPOA MultiProtocol Over Asynchronous transfer mode
MPSD MultiPath Storage Director
MPX multiplex
MS Message Store
MS-DOS Microsoft Disk Operating System
MSA Metropolitan Statistical Area
MSD Most Significant Digit
MSG Message
MSM MultiSession Monitor
MSW Machine Status Word
MTA Message Transfer Agent
MTBF MeanTime Between Failures
MTDA Mean Time Data Availability
MTS Message Transfer System
MUD Multi-User Dungeon
MULTICS MULTiplexed Information and Computing Service
MUMPS Massachusetts General Hospital Utility Multi-Programmings
System
MUMPS Multi-User Multi-ProgrammingSystem
MVS Multiple Virtual System
MVS/ESA Multiple Virtual System / Extended System Architecture
MVS/XA Multiple Virtual System / Extended Architecture
MVSCP MVS Configuration Program
Top
N
NAC Network Adapter Card
NAK Negative Acknowledgement
NAP Network Access Point
NAS Network Access Server
NAT Network Address Translation
NAU Network Addressable Unit
NBS National Bureau of Standards
NBS Numeric BackSpace
NC Numeric Control
NCCF Network Communication Control Facility
NCP Network Control Processor
NCP Network Control Program
NCP/VS Network Control Program/Virtual Storage
NDIS Network Driver Interface Specification
NetSP Network Security Program
NFNT New font numbering table
NFS Network File System
NHRP Next Hop Routing Protocol
NIC Network Interface Card
NIC Network Information Center
NIS Network Information Service
NIST National Institute for Standards and Technology NJE
Network Job Entry
NL New Line
NLQ Near Letter Quality
NLT Nucleus Load Table
NMI NonMaskable Interrupt
NNTP Network News Transport Protocol
NSA National Security Agency
NSC1 Network Systems Cypher One
NSP Numeric Space
NSS NATURAL Security-System
NT Network Termination
NTS/2 Network Transport Services/2
NTSC National Television System Committee
NUI Network User Identification
NUL Null
NUMA Non-Uniform Memory Access
NVOD Near Video On Demand
NVRAM NonVolatile Random Access Memory
NVS NonVolatile Storage
Top
O
O/R Originator / Recipient
OC3 155 Mbit/s
OCR Optical Character Recognition
OCX OLE Control Extension
ODA Open Document Architecture
ODSI Open Directory Service Interfaces
OEM Original Equipment Manufacturer
OI Object Interface
OLE Object Linking and Embedding
OLTEP On-Line Test Executive Program
OLTP On-Line Transaction Processing
OMG Object Management Group
OMR Optical Mark Recognition
OO Objektorientierung
OOA Objektorientierte Analyse
OODBMS Object Oriented DBMS
OOP Objektorientierte Programmierung
OOPL Object Oriented Programming Language
OOPS Object Oriented Programming System
OP Operator Panel
OPI Open Prepress Interface
ORB Object Request Broker
OS Operating
System
OS/2 Operating System/2
OSA Office Systems Architecture
OSA Open System Architecture
OSF Open Software Foundation
OSI Open Systems Interconnection
OSI/RM OSI Reference Model
OSNS Open Systems Network Support
OSPF Open Shortest Path First
OSTC Open System Testing Consortium
OTPROM One Time Programable ROM
OWL Object Windows Library
Top
P
PABX Private Automatic Branch Exchange
PAD Packet Assembly Disassembly
PAL Phase Alternating Line
PAL Programmable Array Logic
PAM Partitioned Access Method
PAP Password Authentication Protocol PB PetaByte
(1,125,899,906,842,624 bytes)
PBX Private Branch Exchange
PC Personal Computer
PC Personal Computing
PC Program Control
PCB Printed Circuit Board
PCB Program Control Block
PCI Peripheral Component Interface
PCI Program Controlled Interuption
PCIL Private Core Image Library
PCL Printer Control Language
PCM Plug Compatible Manufacturers
PCMCIA Personal Computer Memory Card International Association
PCN Personal Communication Network
PCP Program Control Program
PCS Personal Communication Services
PCT Private Communication Technology
PCT Program Control Table
PD Public Domain
PDA Personal Digital Assistant
PDAD Proposed Draft Addendum
PDAU Physical Data Access Unit
PDF Program Development Facility
PDL Page Description Language
PDO Portable Distributed Objects
PDS Partitioned Data Set
PDS Premise Distribution System
PDS Processor Direct Slot
PDU Protocol Data Unit
PDX Printer Description Extension
PE Printer's error
PE Protection Enabled PEARL Processor and Experiment
Automation Realtime Language
PEM Privacy Enhanced Mail
PEP Partitioned Emulation Program
PER Program Event Recording
PERL Practical Extraction and Report language
PF Parity Flag
PFK Program Function Key(board)
PFM Printer Font Metric
PGA Professional graphics adapter
PGP Pretty Good Privacy
PIB Program Information Block
PID Process ID
PIFS Point InterFrame Space
PIM Personal Information Management
PIN Personal Identification Number
PIOCS Physical Input/Output Control System
PL Procedure Library
PL/1 Programming Language 1
PLI Programming Language 1
PLPA Pageable Link Pack Area
PLT Program List Table
PLU Primary Logical Unit
PMMU Paged memory management unit
PMS Pantone Matching System
PMS Project Management System
PMT Photomechanical Transfer (photostat)
PMT Photomultiplier Tube
PNNI Private Network-to-Network Interface
POC Program-Operator Communication
POP Point Of Presence
POP Post Office Protocol
POSIX Portable Operating System Interface for UNIX
POTS Plain Old Telephone System POWER Priority Output Writer,
Execution processors and input Readers
PP Presentation Position
PPD PostScript Printer Description
PPGA Plastic Pin Grid Array
PPM Pages Per Minute
PPP Point-to-Point Protocol
PPT Processing Program Table
PPTP Point-to-Point Tunneling Protocol
PPV Pay Per View
PRDMD Private Directory Management Domain
PRL Private Relocatable Library
PRMD Private Management Domain
PROM Programable Read Only Memory
PSB Program Specification Block
PSDN Packet Swiched Data Network
PSRAM Pseudo SRAM
PSSL Private Source Statement Library
PSTN Public Swiched Telephone Network
PSW Program Status Word
PTF Program Temporary Fix
PTR PoinTeR
PU Physical Unit
PUB Physical Unit Block
PVC Permanent Virtual Circuit
PVP Packet Video Processor
PWB Printed Wire Board
PWS Programmable WorkStation
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Q
QAM Quadrature Amplitude Modulation
QBE Query By Example
QCIF Quater Common Intermediate Format
QIC Quarter-Inch Cartridge
QSAM Queued Sequential Access Method
QTAM Queued Teleprocessing Access Method
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R
R0 Record zero
RACF Resource Access Control Facility
RAID Redundant Array of Inexpensive Disks
RAID Redundant Array of Independent Disks
RAM Random Access Memory
RARP Reverse Address Resolution Protocol
RBA Relative Byte Adresse
RC Robot Control
RCP Remote Communication Processor RCS Revision Control System
RDA Remote Data Access
RDBMS Relational DataBase Management System
RDN Relative Distinguished Name
RES Restore
RF Resume Flag
RFC Request For Comments
RFF Required Form Feed
RFS Remote File System
RGB Red, Green, Blue
RGM Red, Green, Blue (Monitor)
RIFF Resource Interchange File Format
RIP Raster Image Processor
RIP Router Information Protocol
RISC Reduced Instruction Set Computer
RJE Remote Job Entry
RL Relocatable Library
RLD
Relocation Dictionary
RLE Run Length Encoded file
RLL Run Length Limited
RMF Resource Management Facility
RNL Required New Line
ROM Read Only Memory
RPC Remote Procedure Call
RPG Report Program Generator
RPL Requestor's Privilege Level
RPL Research Programming Language
RPM Revolutions Per Minute
RPS Rotational Position Sensing
RPT Repeat
RRDS Relative Record Data Set
RRED Right Reading Emulsion Down
RREU Right Reading Emulsion Up
RS Record Separator
RSP Required Space
RSVP Resource Reservation Protocol
RTC Real Time Clock
RTCP Realtime Transport Control Protocol
RTF Rich Text Format
RTM/SF Realtime Monitor / Systems Facility
RTP Realtime Transport Protocol
RTSE Reliable Transfer Service Element
RWSI Remote Workstation Interface
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S
S.W.I.F.T. Society for Worldwide Interbank Financial
Telecommunication
S/STP Shielded STP
SA Set Attribute
SAA Storage Accounting Area
SAA System Application Architecture
SAM Sequential Access Method
SAP Service Access Point
SAP Service Advertising Protocol
SAR Segmentation And Reassembly
SBCS Single Byte Character Set
SBS Subscript
SC Storage Control
SCA Shared Control Array
SCCS Source Code Control System
SCDS Source Control Data Set
SCI Scalable Coherent Interconnect SCODL Scanned Conversion
Object Description Language
SCP Storage Control Program
SCP System Control Program
SCRAM Static Column Random Access Memory
SCSI Small Computer Systems Interface
SDH Synchronous Digital Hierarchy
SDK Software Development Kit
SDL System Directory List
SDLC Synchronous Data Link Control
SDRAM Synchronous DRAM
SDSF System Display and Search Facility
SE Software Entwicklung
SE System Engineer
SECC Single Edge Contact Connector
SECAM Sequential Couleur a'Memorie
SEL Select
SEPP Single Edge Processor Package
SET Software-Engineering-Technology
SF Sign Flag
SF Support Facility
SFA Salesforce Automation
SFBI Shared Frame Buffer Interconnect
SFE Start Field Extended
SFT System Fault Tolerance
SFTP Shielded Foil Twisted Pair
SGML Standard Generalized Markup Language
SHTTP Secure HTTP
SHY Syllable Hyphen SI Shift In
SI Single Inheritance
SI Standard Interface SIFS Short InterFrame Space
SIFT Stanford Information Filtering Tool SIG Special Interest
Group
SIM Service Information Message
SIMD Single Instruction Multiple Data
SIMM Single In-line Memory Module
SIRDS Single Image Random Dot Stereogram
SIT System Initialization Table
SL Source Statement Library
SLD Structured Logic Design
SLED Single Large Expensive Disk
SLIP Serial Line Internet Protocol
SLR Service Level Reporter
SLU Secondary Logical Unit
SM Set Mode
SMDS Switched Multimegabit Data Service
SMF System Management Facility
SML MVS Storage Management Library
SMLI Stateful MultiLayer Inspection
SMP Symetric MultiProcessing
SMP System Modification Program
SMS Storage Management Subsystem
SMTP Simple Mail Transfer Protocol
SNA System Network Architecture
SNADS SNA Distribution Services
SNMP Simple Network Management Protocol
SNOBOL String Oriented Symbolic Language
SNT Sign-On Table
SO Shift Out SOD Service On Demand
SOH Start Of Heading
SOM System Object Model
SOS Start Of Significance
SP Space
SPA Software Publishers Association
SPARC Scalar Processor ARChitecture
SPDU Session Protocol Data Unit
SPM System Performance Monitor/2
SPOOL Simultaneous Peripheral Operations On Line
SPP Scalable Parallel Processing
SPS Superscript
SPX Sequenced Packet eXchange
SQL Structured Query Language
SQL/DS Structured Query Language / Data System
SRAM Static Random Access Memory
SRT System Recovery Table
SRU Shared Resource Unit
SS Single Sided
SS Stack Segment
SSCP System Service Control Point
SSID SubSystem IDentifier
SSL Secure Socket Layer
STM Synchronous Transfer Mode
STP Shielded Twisted Pair
STT Secure Transaction Technology
STX Start of Text
SUB Substitute
SV Storage Violation
SVA Shared Virtual Area
SVC Supervisor Call
SVC Switched Virtual Circuit
SVGA Super-VGA SW Switch
SWOP Specifications for Web Offset Printing
SYN Synchronous Idle
SYSOP System Operator
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T
T1 1.544 Mbit/s
T3 45 Mbit/s
TARGA Truevision Advanced Raster Graphics Adapter
TB TeraByte (1,099,511,627,776 bytes)
TC Terminal Control
TCA Task Control Area
TCAM Telecommunications Access Method
TCB Task Control Block
TCL Tool Command Language
TCM Thermal Conduction Module
TCO Triple Capacity Option
TCP Terminal Control Program
TCP Transmission Control Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
TCT Terminal Control Table
TCTTE Terminal Control Table Terminal Entry
TCU Transmission Control Unit TD Transient Data
TDIA Transient Data Input Area
TDM
Time-Division Multiplexing
TDOA Transient Data Output Area
TDP Transient Data Program
TEO Technical Electronic Office
TF Trap Flag
TIC Technical Integrity Check
TIFF Tagged Image File Format
TIOA Terminal Input/Output Area
TLB Translation Lookaside Buffer
TLBL Tape Label
TMO Thermo-Magneto-Optic technology
TNEF Transport-Neutral Encapsulation Format
TOC Table Of Contents
TOP Technical Office Protocol
TPDU Transport Protocol Data Unit
TPF Transaction Processing Facility
TPI Tracks Per Inch
TPM Third-Party Maintenance
TPS Transactions Per Second
TRN Transparent
TS Telecommunication System
TS Temporary Storage TSIOA Temporary Storage Input/Output Area
TSO Time Sharing Option
TSP Temporary Storage Program
TSR Terminate and Stay Resident
TTA Teletex Attachment (Teletexzusatz)
TTL Transistor Transistor Logic
TTR Track Record
TTY TeleTYpe
TWA Transaction Work Area
TWA Two-Way Alternate
TWS Two-Way Simultaneous TX Telex TXT Text
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U
UA User Agent
UAE Unrecoverable Application error
UART Universal Asynchronous Receiver/Transmitter UBR Undefined
Bit Rate
UBS Unit Backspace
UCB Unit Control Block
UCR Undercolor removal
UCS Universal Character Set
UCSB Universal Character Set Buffer
UCW Unit Control Word
UDP User Datagram Protocol
UI User Interface
UID User ID
UMB Upper Memory Block
UNC Universal Naming Convention
UNC Universal Network Convention
UPC Universal Product Code
UPS Uninterruptible Power Supply
UPSI User Program Switch Indicator
UR Unit Record
URL Uniform Resource Locator
US Unit
Separator
USART Universal Synchronous/Asynchronous Receiver/Transmitter
USENET USEr NETwork
USM UnSharp Masking
USRT Universal Synchronous Receiver/Transmitter USV
Unterbrechungsfreie StromVersorgung
UTP Unshielded Twisted Pair
UUCP Unix-to-Unix Copy Program
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V
VAD Value Added Dealer
VAN Value Added Network
VAP Value Added Process
VAR Value Added Reseller
VAST Virtual Archive Storage Technology
VB Visual Basic VBA Visual Basic for Applications VBR Variable
Bit Rate
VBN Vermitteltes Breitbandnetz
VC Virtual Circuit
VC-SDRAM Virtual Channel SDRAM
VCC Virtual Circuit Connection
VCI Virtual Circuit Identifier
VCNA Vtam Communication Network Application VCPI Virtual
Control Program Interface
VDAC Video Digital Analog Converter
VDI Video Display Interface
VDT Video
Display Terminal
VDU Visual Display Unit
VERONICA Very Easy Rodent-Oriented Netwide Index to
Computerized Archives
VGA Video Graphics Array
VGC Video Graphics Controller
VGM Video Graphics Monitor
VHDSL Very High-bit rate Digital Subscriber Loop VHLL Very
High-Level Language
VHS Video Home System
VIO Video Input/Output
VIO Virtual Input/Output
VIPA Virtual IP Addressing
VLAN Virtual LAN
VLSI Very Large Scale Integration
VM Virtual Machine
VM/SP Virtual Machine / System Product
VMMAP VM Monitor Analysis Program
VMOS Vertical MOS
VMPPF VM Performance Planning Facility
VMPRF VM Performance Reporting Facility
VMS Virtual Management System
VOD Video On Demand
VPD Vital Product Data
VPDN Virtual Private Data Network
VPI Virtual Path Identifier
VPN Virtual Private Network
VR Virtual Reality
VRAM Video RAM
VRML Virtual Reality Modeling Language
VRC Vertical Redundancy Checking
VS Virtual Storage
VSAM Virtual Storage Access Method
VSAT Very Small Aperture Terminal
VSM Virtual Storage Management
VSN Volume Serial Number
VT Vertical Tab
VTAM Virtual Telecommunications Access Method VTOC Volume
Table of Contents
VTP Virtual Terminal Protocol
VTP Virtual Terminal Program
VTX VideoTeXt
VVDS VSAM Volume Data Set
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W
W3 World Wide Web
W4WG Windows for Workgroups
WABI Windows Application Binary Interface
WAIS Wide Area Information Service
WAN Wide Area Network
WATM Wireless ATM
WATS Wide Area Telecommunications Service
WHAT Wireless Hybrid Asynchronous Time-bounded WIMP Windows,
Icons, Mice and Pointers
WINS Windows Internet Name Service
WMAC Wireless Media Access Control
WMF Windows metafile
WORM Write Once, Read Many times
WOSA Windows Open Services/Systems Architecture WRED Wrong
Reading Emulsion Down
WREU Wrong Reading Emulsion Up
WS WorkStation
WTO Write To Operator
WUS Word Underscore
WWW World Wide Web
WXTRN Weak External Reference
WYSIWYG What You See Is What You Get
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X
XA EXtended Architecture
XIP Execute In Place
XLT Transaction List Table
XMS Extended Memory Specification
XT eXtended Technology
Y
Y2K Year 2000
YIQ (color components in NTSC color space)
YUV (color components in SECAM and PAL color spaces)
Z
ZBR Zero Bug Release
ZD Zero Defects
ZF Zero Flag
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