Computer Terms: Acronyms & Abbreviations

Find here a list of important computer acronyms and abbreviations

Abbreviation	Full-Form – Meaning
AAC	Advanced Audio Coding
AAL	ATM Adaptation Layer
AARP	Apple Talk Address Resolution Protocol
AAUI	Apple Attachment Unit Interface
ABA
ABC	Atanasoff-Berry Computer
ABM	Asynchronous Balanced Mode
ABR	Available Bit Rate
AC	Alternating Current
AC3	Audio Compression 3
ACF	Advanced Communications Function
ACF/NCP	Advanced Communications Function / Network Control Program
ACID	Atomicity, Consistency, Isolation, and Durability
ACK	Acknowledgment
ACL	1) Access Control List 2) Asynchronous Connectionless Type
ACPI	Advanced Configuration and Power Interface
ACSE	Association Control Service Element
ACTSAI	Advanced Communications Technology Satellite ATM Internetwork
AD	1) Administrative Domain 2) Active Directory
ADC	Analog-to-Digital Conversion
ADCCP	Advanced-Data Communications Control Protocol
ADDMD	Administrative Directory Management Domain
ADF	Automatic Document Feeder
ADMD	Administration Management Domain
ADO	ActiveX Data Objects
ADP	Authoritative Data Producer
ADPCM	Adaptive Differential Pulse Code Modulation
ADS	Authoritative Data Source
ADSI	Active Directory Services Interface
ADSL	Asymmetric Digital Subscriber Line
ADSM	ADSTAR Distributed Storage Manager
ADSP	Apple Talk Data Stream Protocol
AEP	Apple Talk Echo Protocol
ADT	Abstract Data Type
AET	Application Entity Title
AFIS	Automated Fingerprint Identification System
AFP	Apple Talk Filing Protocol
AGP	Advanced Graphics Port
AGS	Advanced Gateway Server
AGS+	Advanced Gateway Server Plus
AI	Artificial Intelligence
AIDC	Automatic Identification and Data Capture
AIFF	Audio Interchange File Format
AIML	Artificial Intelligence Markup Language
AIS	Alarm Indication Signal
AJAX	Asynchronous Javascript and XML
AKA	Also Known As
ALGOL	Algorithmic Language
ALU	Arithmetic-Logic Unit
AMA	Active Member Address
AMD	Advanced Micro Devices
AMI	American Megatrends Inc.
AMF	Action Message Format
AMG	Architecture Management Group
AMP	Active Monitor Present
AN	Access Node
ANI	Automatic Number Identification
ANSI	American National Standards Institute
AoE	ATA over Ethernet
AOL	America On-Line
AOP	Association of Online Professionals
APDU	Application Protocol Data Unit
API	Application Programming Interface
ARD	Application Requirements Document
APM	Advanced Power Management
APP	Applications
APPC	Advanced Peer-to-Peer Communications
APPC/PC	Advanced Peer-to-Peer Communications for Personal Computers
APPN	Advanced Peer-to-Peer Networking
APS	Automatic Protection Switching
ARCNET	Attached Resource Computer Network
ARM	Asynchronous Response Mode
ARP	Address Resolution Protocol
ARPA	Advanced Research Projects Agency
ARPANET	ARPA Net
ARQ	Automatic Repeat Request
ARU	Audio Response Unit
AS	Autonomous System
ASCII	American Standard Code for Information Interchange
ASF	Advanced Streaming Format
ASF	Apache Software Foundation
ASIC	Application-Specific Integrated Circuit
ASN.1	Abstract Syntax Notation One
ASP	1) Apple Talk Session Protocol 2) Active Server Pages 3) Application Service Provider
ASPX	Active Server Page Framework
ASR	Automatic Speech Recognition
AT	1) Advanced Technology 2) Asynchronous Transmission
ATA	1) Advanced Technology Architecture 2) Analog Terminal Adapter
ATAPI	ATA Packet Interface
ATDM	Asynchronous Time DeMultiplexing
ATDNet	Advanced Technology Demonstration Network
ATG	Address Translation Gateway
ATL	Active Template Library
ATM	1) Asynchronous Transfer Mode 2) Automatic Teller Machine 3) Adobe Type Manager
ATM25	ATM at 25 Mbps
ATMF	ATM Forum
ATP	Apple Talk Transaction Protocol
ATX	AT Extended
AT&T	American Telephone & Telegraph Company
AUI	Attachment Unit Interface
AURP	Apple Talk Update-Based Routing Protocol
AV	Anti Virus
AVI	Audio Video Interleaved
AVL	Automatic Vehicle Location
AVS	Address Verification System
AWG	American Wire Gauge
AWT	Abstract Window Toolkit / Alternative Window Toolkit / Applet Widget Toolkit
A&E	Architectural and Engineering
A/D	Analog to Digital
A/V	Audio / Video

Abbreviation	Full-Form – Meaning
B Channel	Bearer Channel
BASH	Bourne Again Shell
BDCs	Backup Domain Controllers
BARRNET	Bay Area Regional Research NETwork
BASIC	Beginners All-purpose Symbolic Instruction Code
BBS	Bulletin Board System
BCD	Binary Coded Decimal
BCNF	Boyce Codd Normal Form
BCS	Battery Computer System
BER	1) Base Encoding Rules 2) Bit-Error Rate
BERT	Bit-Error-Rate Tester
BGA	Ball Grid Array
BGP	Border Gateway Protocol
BIND	Berkeley Internet Name Domain
BIOS	Basic Input-Output System
BISDN	Broadband Integrated Services Digital Network
BISYNK	Binary Synchronous Communication Protocol
BIT	BInary digiT
BITNET	Because It’s Time NETwork
BIU	Basic Information Unit
BLERT	Block-Error-Rate Test
BMP	Bit MaP
BNC	Bayonet Connectors
BNF	Backus Normal Form
BOOTP	BOOTstrapProtocol
BOOTPROM	Boot Programmable Read-Only Memory
BPDU	Bridge Protocol Data Unit
BPEL4WS	Business Process Execution Language for Web Services
BPML	Business Process Modeling Language
BPR	Business-Process Reengineering
bps	Bits Per Second
BRI	Basic Rate Interface
BPSS	Business Process Specification Schema
BSC	Binary Synchronous Communication
BSD	Berkeley Software Distribution
BSH	Bourne Shell
BTO	Build-To-Order
BTR	Betting The Ranch
BYTE	Binary Term
B2B	Business to Business
B2C	Business to Customer

Abbreviation	Full-Form – Meaning
CA	1) Certification Authority 2) Computer Associates
CAD	Computer-Aided Design
CAD Tools	Computer-Aided Design Tools
CAE	1) Computer-Aided Engineering 2) Common Applications Environment
CAI	Computer-Aided Instruction o Computer-Assisted Instruction
CAIRN	Collaborative Advanced Interagency Research Network
CAL	Client Access License
CAM	Computer Aided Manufacturing
CAN	1) Campus Area Network 2) Controller Area Network
CANet	CAnadian Net
CAP	Carrierless Amplitude and Phase modulation
CAR	Courtesy Amount Recognition
CAS	1) Central Authentication Service Collision 2) Communicating Applications Specification
CASE	Computer-Aided Software (o System) Engineering
CAT	Computer Aided Translation
CATV	Community Antenna TeleVision
CAU	Controller Access Unit
CAVE	Computer-Assisted Virtual Environment
CAVERN	Computer-Assisted Virtual Environment Research Network
CBASIC	Compiled BASIC
CBC	Cipher Block Chaining
CBEFF	Common Biometric Exchange File Format
CBI	Computer-Based Instruction
CBR	Constant Bit Rate
CBT	Computer Based Training
CCD	Charge-Coupled Device
CCITT	Consultative Committee on International Telephone and Telegraph
CCT	Closed-Circuit Television
CCS	Common Channel Signaling
CCV	Credit Card Verification
CD	Compact Disk
CD-I	CD Interactive
CDBS	Common Database Server
CDF	Channel Definition Format
CDMA	Code Division Multiple Access
CDP	CRL Distribution Point
CD-R	CD-Recordable
CDROM	Compact Disc ROM
CD-ROM	ver CDROM
CD-ROM/XA	Compact Disc – Read-Only Memory / Extended Architecture
CD-RW	CD-ReWritable
CD-W	CD Writable
CDDI	Copper Distributed Data Interconnection
CDE	Common Desktop Environment
CDPD	Cellular Digital Packed Data
CDS	Common Data Server
CDSL	Consumer DSL
CE	Conformité Européenne
CELP	Code-Excited Linear Prediction
CEO	Chief Executive Officer
CERN	Centre Européen de Recherche Nuclair
CERT	Computer Emergency Response Team
CF	Compact Flash
CGA	Color Graphics Adapter
CGI	Common Gateway Interface
CICS	Customer Information Control System
CIDR	Classless Inter-Domain Routing
CIFS	Common Internet File System
CIL	Common Language Infrastructure
CIM	Computer Integrated Manufacturing
CIO	Chief Information Officer
CISC	Complex Instruction Set of Commands
CIR	Committed Information Rate
CIS	Contact Image Sensing
CISC	Complex Instruction Set Computer
CIX	Commercial Internet eXchange
CLUF	.
CLR	Common Language Runtime
CLUT	Color Look-Up Table
CM	Configuration Management
CMI	Computer Managed Instruction
CMM	Capability Maturity Model
CMMI	Capability Maturity Model Integration
CMOS	Complementary Metal Oxide Conductor
CMS	Content Management System
CMYK	Cyan, Magenta, Yellow, and blacK
CNAC	Closed Network Acces Control
CO	Central Office
COBOL	Common Bussines-Oriented Language
CODEC	Compression / Decompression
COM	Component Object Model
COO	Chief Operational Officer
CORBA	Common Object Request Broker Architecture
CORDRA	Content Object Repository Discovery and Registration Architecture
COSS	Common Object Services Specification
COTS	Commercial Off-The-Shelf
CP	Communication Processor
CPE	Customer Premises Equipment
CPI	.
cps	characters per second
CPU	Central Processing Unit
CP/M	Control Program for Microcomputers
CQL	1) Common Query Language 2) Continuous Query Language
CR	1) Carriage Return 2) Change Request
CRC	Cyclic Redundancy Check
CREN	Corporation for Research and Educational Networking
CRL	Certificate Revocation List
CRM	Customer Relationship Management
CRT	Cathode Ray Tube
CRS	Content Replication Service
CRT	Cathode Ray Tube
CS	1) Convergence Sublayer 2) CompuServe
CSA	Common Service Area
CSC	Computer Software Component
CSCI	Computer Software Configuration Item
CSH	C Shell
CSI	Called Subscriber Identifier
CSMA	Carrier Sense Multiple Access
CSMA/CD	Carrier Sense Multiple Access with Collision Detection
CSNET	Computer + Science NETwork
CSP	Cryptographic Service Provider
CSS	Cascading Style Sheets
CSU	Computer Software Unit
CSV	Comma Separated Values
CVE	Common Vulnerabilities and Exposures
CVP	Content Vectoring Protocol
CVS	Concurrent Versioning System
CVSD	Continuously Variable Slope Differential Modulation

Abbreviation	Full-Form – Meaning
D Channel	Data Channel
DA	Data Administrator
DA	Data Analysis
DAA	Digest Access Authentication
DAML	DARPA Agent Markup Language
DAO	Data Access Objects
DAO	Data Access Objects
DAP	Directory Access Protocol
DAQ	Data Acquisition
DARPA	Defense Advanced Research Projects Agency
DAT	Digital Audio Tape
DAWG	Data Access Working Group
dB	Decibels
DB	DataBase
DB-25	DB-25
DBA	DataBase Administrator
dBm	Decibels Per Meter
DBMS	DataBase Management System
DBS	DataBase System
DC	Direct Current
DCA	Document Content Architecture
DCC	Direct Cable Connection
DCD	Data Carrier Detect
DCE	1) Data Communications Equipment 2) Data Circuit-terminating Equipment
DCL	Data Control Language
DCOM	Distributed COM
DDBMS	Distributed DataBase Management System
DDE	Dynamic Data Exchange
DDL	1) Data Description Language 2) Document Description Language 3) Direct Data Link
DDMA	Distributed Direct Memory Access
DDoS	Distributed Denial of Service
DDP	Datagram Delivery Protocol
DDR	Double Data Rate
DDR DRAM	Double-Data-Rate DRAM
DDS	Digital Data Service
DEC	Digital Equipment Corporation
DECnet	Digital Equipment Corporation Network
DECT	Digital Enhanced Cordless Telecommunications
DES	Data Encryption Standard
DFA	Deterministic Finite Automata
DFC	Data Flow Control
DFD	Data Flow Diagram
DGPS	Differential GPS
DHCP	Dynamic Host Configuration Protocol
DHTML	Dynamic HTML
DIB	Device Independent Bitmap
DID	Direct Inward Dialing
DIF	Data Interchange Format
DIMM	Double In-Line Memory Module
DIN	Deutsche Industrie Norm
DIP	Dual In-Line Package
DIS	Draft International Standard
DITA	Darwin Information Typing Architecture
DL	DownLoad
DLCI	Data Link Connection Identifier
DLL	Dynamic Link Library
DMA	1) Direct Memory Access 2) Digital Message Device
DMD	Directory Management Domain
DML	Data Manipulation Language
DMS	Document Management System
DMZ	Demilitarized Zone
DN	Distinguished Name
DNA	1) Digital Network Architecture 2) Distributed Internet Applications/Architecture
DLP	Digital Light Processing
DML	Data Manipulation Language
DMT	Discrete Multitone
DNA	Digital Network Architecture
DNS	Domain Naming Service
DoD	Department of Defense
DOM	Document Object Model
DoS	Denial of Services
DOS	Disk Operating System
dp	Dot Pitch
DPA	Demand Priority Architecture
dpi	dots per inch
DPMI	DOS Protected Mode Interface
DPMS	Display Power Management Signaling
DQE	Data Quality Engineering
DRAM	Dynamic RAM
DRC	Domains Relational Calculus
DRDA	1) Distributed Relational 2) Database Architecture
DRM	1) Device Relationship Management 2) Digital Rights Management
DRDA	Distributed Relational DataBase Architecture
DSA	Directory Service Agent
DSD	Data Structure Definition
DSL	Digital Subscriber Line
DSN	Data Source Number
DSP	1) Digital Signal Processor 2) Directory Service Protocol
DSR	Data Set Ready
DSS	Digital Signature Standard
DSSSL	Document Style Semantics and Specification Language
DSU/CSU	Data Service Unit / Channel Service Unit
DTD	Document Type Definition
DTMF	Dual Tone Multi Frequency
DTE	Data Terminal Equipment
DTP	DeskTop Publisher
DTR	Data Terminal Ready
DUA	Directory User Agent
DUN	Dial-Up Networking
DV	Digital Video
DVB	Digital Video Broadcast(ing)
DVD	Digital Video Disk / Digital Versatile Disk
DVD-RAM	Digital Video Disk RAM
DVD-ROM	Digital Video Disk ROM
DVD+RW	Digital Video Disc ReWritable
DVI	1) Digital Video Input 2) Digital Video Interface
DW	Data Warehouse
D/A	Digital to Analog

Abbreviation	Full-Form – Meaning
E/S	ver I/O
EAN	European Association for Numeration or Articles
EAO	ver CAI
EAS	Electronic Article Surveillance
ECB	Electronic CodeBook
EBCDIC	Extended Binary Coded Decimal Interchange Code
ECC	Error-Correcting Code
ECM	Enterprise Content Management
ECMA	European Computer Manufacturers Asociation
ECTF	Enterprise Computer Telephony Forum
EDI	Electronic Data Interchange
EDO RAM	Extended Data Out RAM
EDSM	Event-Driven State Machine
EDVAC	Electronic Discrete Variable Automatic Computer
EEI	External Environment Interface
EFS	Encrypted File System
EFTS	Electronic Fingerprint Transmission Specification
EGA	Enhanced Graphics Adapter
EGP	External Gateway Protocol
EIA	Electronic Industries Association
EICAR	European Institute of Computer Antivirus Research
EIDE	Enhanced IDE
EISA	Extended ISA
EJB	Enterprise Java Bean
EMA	Enterprise Management Architecture
email	Electronic Mail
EMBM	Environment-Mapped Bump Mapping
EMF	Enhanced Metafile
EMI	Electro-Magnetic Interference
EMM	Expand Memory Manager
EMS	Expand Memory Specification
ENIAC	Electronic Numerical Integrator And Computer
EOM	End Of Message
EOT	End Of Transmission
EPA	Environmental Protection Agency
EPC	Electronic Product Code
EPROM	Erasable Programmable ROM
EPS	Encapsulated Postscript
EPSF	Encapsulated PostScript Format
EPSS	Employee Performance Support System
E-R	Entity-Relationship
ERD	Entity – Relationship Diagram
ERM	Entity – Relationship Model
ERP	Exterior Routing Protocol
ES	End System
ESA	Enterprise System Architecture
ESD	Electronic Software Delivery
ESP	External Service Provider
ETB	End of Text Block
EthIR	Ethernet Infra Red
ETR	Early Token Release
ETX	End of Text
EULA	End-User License Agreement
EXIF	Exchangeable Image File

Abbreviation	Full-Form – Meaning
F SCSI	Fast SCSI
F W SCSI	Fast-Wide SCSI
FAQ	Frequently Asked Questions
FAR	False Accept Rate
FAT	File Attribute Table
FAT16	File Attribute Table – 16 bits
FAT32	File Attribute Table – 32 bits
FC	Fibre Channel
FC-AL	Fibre Channel Arbitrated Loop
FCC	Federal Communications Commission
FCS	Frame Check Sequence
FDC	Floppy Disk Controller
FDD	Floppy Disk Drive
FDDI	Fiber Distributed Data Interconnect
FDM	Frequency Division Modulation o Multiplexing
FDX	Full Duplex
FEC	Fast Ethernet Channel
FIFO	First In First Out
FIR	Fast ethernet Infra Red
FIT	Fingerprint Identification Technology
FLOPS	Floating point Operation Per Second
FLV	Flash Video
FM	Frequency Modulation
FO	1) Fiber-Optic 2) Formatting Object
FOSS	Free and Open Source Software
FORTRAN	FORmula TRANslation
FP	Floating Point
FPGA	Field-Programmable Gate Arrays
FQHN	Fully Qualified Host Name
FPU	Floating Point Unit
FRAD	Frame Relay Access Device
FRF	Frame Relay Forum
FRFH	Frame Relay Frame Handler
FRSE	Frame Relay Switching Equipment
FRTE	Frame Relay Terminal Equipment
FSE	1) Fast Software Encryption 2) Foundations of Software Engineering
FSK	Frequency-Shift Keying
FSM	Finite-State Machine
FTAM	File Transfer and Access Management
FTS	Full-Text Search
FTP	File Transfer Protocol
FXO	Foreign Exchange Office
FXS	Foreign Exchange Subscriber

Abbreviation	Full-Form – Meaning
G	Graphics port
GAP	Gateway Access Protocol
GARP	Group Address Registration Protocol
Gb	Gigabit
GB	Gigabyte
GBICs	Gigabit Interface Connectors
Gbps	GigaBits Per Second
GCF	Generic Connection Framework
GCS	Global Coordinate System
GDBM	GNU DataBase Manager
GDDM	Graphical Data Display Manager
GDI	1) Graphics Device Interface 2) Graphical 2D/3D Interface
GHz	Gigahertz
GIF	Graphical Interchange Format
GigaPOP	Gigabit Point of Presence
GINA	Graphical Identification aNd Authentication
GIOP	Generalized Inter-ORB Protocol
GIS	Geographical Information System
GHz	Gigahertz
GMR	Giant MagnetoResistive technology
GMS	Global Mobile System
GMT	Greenwich Mean Time
GND	Ground
GNU	Gnu is Not Unix
GPL	General Public License
GPRS	1) General Packet Radio Service 2) Global Packet Radio Service
GPS	Global Positioning Satellite
GPU	Graphics Processing Unit
GSM	Global System for Mobile Communications
GTLD	Generic Top Level Domain
GUI	Graphical User Interface
GUID	Globally Unique Identifier

Abbreviation	Full-Form – Meaning
HACP	HTTP AICC CMI Protocol
HAL	Hardware Abstraction Layer
HAN	House Area Network
HANA	High Definition Audio-Video Network Alliance
HBA	Host Bus Adapter
HCE	Hub Common Equipment
HCL	Hardware Compatibility List
HCRP	Hardcopy Cable Replacement Profile
HCV	High Capacity Voice
HD	1) High Density 2) HDD
HDC	Hard Disk Controller
HDD	Hard Disk Drive
HDLC	High-level Data Link Control Protocol
HDML	Handheld Devices Markup Language
HDSL	High-bit rate DSL
HDTV	High Definition TV
HDX	Half Duplex Transmission
HF	High Frecuency
HFDF	High Frequency Direction Finder
HFS	Hierarchical File System
HG	Harvard Graphics
HID	Human Interface Devices
HiFD	High capacity Floppy Disk
HLA	High Level Architecture
HLS	Hue, Lightness and Saturation
HMAC	Hashed Message Authentication Code
HMI	Human Machine Interface
HMMs	Hidden Markov Models
HOLAP	Hybrid OLAP
HP	Hewlett-Packard
HPC	Handheld Personal Computer
HPGL	Hewlett-Packard Graphics Language
HPOM	Home Page Object Model
HQA	Hardware Quality Assurance
HSL	Hue, Saturation and Lightness
HSM	Hierarchical Storage Management
HTML	HyperText Markup Language
HSV	Hue Saturation Value
HTTP	HyperText Transfer Protocol
HTTPD	Hyper Text Transfer Protocol Daemon
HTTPS	Hyper Text Transfer Protocol Secure
HUXGA	Hex Ultra XGA
HVAC	Heating, Ventilation and Air Conditioning
HWD	Height, Width and Depth
Hz	Hertz
H/PC	Handheld PC

Abbreviation	Full-Form – Meaning
I&T	Integration and Testing
I/O	Input/Output
IA	.
IAB	Internet Architecture Board
IAFIS	Integrated Automated Fingerprint Identification System
IANA	Internet Assigner Number Authority
IAX	Inter-Asterisk Exchange
IBM	International Business Machines
IC	Integrated Circuit
ICAO	International Civil Aviation Organization
ICAP	Internet Content Adaptation Protocol
ICE	In-Circuit Emulator
ICMP	Internet Control Message Protocol
ICRA	Internet Content Rating Association
ICS	1) IEEE Computer Society 2) Internet Connection Sharing
ICSA	International Computer Security Association
ID	Identification / Identifier / Identity
IDE	1) Integrated Drive Electronics 2) Integrated Development Environment
IDU	Indoor Unit
IDSL	ISDN DSL
IDT	Integrated Devices Tecnology Co
IDX	Index
IE	Internet Explorer
IE5	Internet Explorer version 5
IEC	International Electrotechnical Commission
IEEE	Institute of Electrical and Electronics Engineers
IETF	Internet Engineering Task Force
IFMP	Ipsilon Flow Management Protocol
IGP	Internal Gateway Protocol
IIS	Internet Information Server
IKE	Internet Key Exchange
ILM	Information Lifecycle Management
ILS	Internet Locator Server
ILT	Instructor-Led Training
IM	Instant Messaging
IMAP	Internet Message Access Protocol
IMS	Instructional Management System
INET	InterNet
IOP	Input/Output Processor
IP	Internet Protocol
IPng	Internet Protocol – Next Generation
IPO	1) Initial Public Offerings 2) International Purchasing Office
IPP	Internet Printing Protocol
IPSec	IP Security
IPTC	International Press Telecommunications Council
IPv.6	IP version 6
IPX	Internet Packet eXchange
IQoS	Internet Quality of Service
IR	Infra Red
IRC	Internet Relay Chat
IRP	Interior Routing Protocol
IRQ	Interrupt ReQuest
IRS	Interface Requirements Specification
IRTF	Internet Research Task Force
IS	Information System
IS-IS	Intermetdiate System to Intermediate System
ISA	1) Industry Standard Architecture 2) Integrated Services Architecture
ISAKMP	Internet Security Association and Key Management Protocol
ISAM	Index-Sequential Access Method
ISAPI	Internet Server Application Programming Interface
ISDN	Integrated Service Digital Network
ISMA	Internet Streaming Media Alliance
ISO	International Standards Organization
ISO 9000	standard ISO 9000
ISO 9660	standard ISO 9660
ISP	1) Internet Service Provider 2) In-System Programming 3) International Standard Profile
ISV	Independent Software Vendor
IT	Information Technology
ITC	Information Technology Center
ITG	Information Technology Group
ITMC	Interface/Time Mission Critical
ITU	International Telecommunication Union
ITU-T	ITU Telecommunication Standardization Sector
IV&V	Independent Verification and Validation
IVDT	Integrated Voice/Data Terminal
IVR	Interactive Voice Response
IVV	Independent Verification and Validation
IWM	Integrated Woz Machine
IXC	Inter eXchange Carrier
I2O	Intelligent Input/Output

Abbreviation	Full-Form – Meaning
J2CA	J2EE Connection Architecture
J2EE	Java 2 Enterprise Edition
J2K	JPEG 2000
J2ME	Java 2 Micro Edition
J2MX	J2EE Management Extensions
J2SE	Java 2 Standard Edition
JAAS	Java Authentication and Authorization Service
JAR	Java ARchive
JAS	Java Application Server
JCA	Java Cryptography Architecture
JCE	Java Cryptography Extension
JCS	Joint Chiefs of Staff
JDBC	Java DataBase Connectivity
JDK	Java Development Kit
JDT	Java Development Tool
JEIDA	Japanese Electronics Industry Development Association
JIDL	Java Interface Definition Language
JIT	Just In Time
JMAPI	Java Management API
JMS	Java Message Service
JNDI	Java Naming and Directory Interface
JNI	Java Native Interface
JPEG	Joints Photographic Experts Group
JS	JavaScript (file extension)
JSA	Java Security Architecture
JSON	JavaScript Object Notation
JSP	Java Server Page
JTA	Java Transaction API
JTAG	Joint Test Action Group
JTS	Java Transaction Service
JVM	Java Virtual Machine

Abbreviation	Full-Form – Meaning
Kb	KiloBits
KB	KiloBytes
Kbps	KiloBits Per Second
KHz	Kilohertz
KNI	Katmai New Instructions
KPA	Key Process Area
KSH	Korn Shell
KW	KiloWatt

Abbreviation	Full-Form – Meaning
L1	Level 1
L2	Level 2
L2CAP	Logical Link Control and Adaptation Protocol
L2F	Layer 2 Forwarding
L2TP	Layer 2 Tunneling Protocol
LAMP	Linux, Apache, MySQL, and PHP/Python/Perl
LAMS	Learning Activity Management System
LAN	Local Area Network
LAP	Link Access Procedure
LAPB	Link Access Procedure – Balanced
LAPD	Link Access Procedure on the D Channel
LAPF	Link Access Procedure for Frame Mode Bearer Services
LAPM	Link Access Procedure for Modems
LAR	Legal Amount Recognition
LASER	Light Amplification by Stimulated Emission of Radiation
LATA	Local Access and Transport Area
LBS	Location Based Service
LCD	Liquid Crystal Display
LCH	Luminance, Chrominance, and Hue
LCN	Logical Channel Number
LDAP	Lightweight Directory Access Protocol
LDDB	Local Directory DataBase
LEC	LAN Emulation Client
LED	Light-Emitting Diode
LES	LAN Emulation Server
LF	Line Feed
LGPL	Lesser General Public License
LIFO	Last In First Out
LILO	Last In – Last Out
LISP	List Processing
LLC	Logical Link Control
LMDS	Local Multipoint Distribution Service
LMS	1) Laser Magnetic Storage 2) Learning Management System
LOM	Learning Object Metadata
LOR	Learning Object Repository
LPC	Linear Predictive Coding
LPT	1) Line printer 2) Low Radiation
LR	1) Learning Resources 2) Linear Regression
LRC	Longitudinal Redundancy Checking
LSI	Large Scale Integration
LRN	Learning Resource interchange
LSB	Least Significant Bit
LSE	Local System Environment
LSI	Large Scale Integrated
LSP	Layered Service Provider
LSSI	.
LTSC	Learning Technology Standards Committee
LU	Logical Unit
LVM	Logical Volume Manager
LZW	Lempel, Ziv and Welch

Abbreviation	Full-Form – Meaning
M&S	Modeling and Simulation
M2M	Mobile to Mobile
MAC	1) Medium Access Control 2) Message Authentication Code
MAP	Manufacturing Automation Protocol
MAPI	Messaging Application Programming Interface
MARC	Machine Readable Cataloging
MAU	Media Sccess Unit
Mb	Megabits
MB	MegaBytes
MBone	Multicasting backBone
Mbps	Megabits per second
MBR	Master Boot Record
MCA	Micro Channel Architecture
MCGA	Multi-Colour Graphics Array
MCS	Microsoft Cluster Server
MCSE	Microsoft Certified Systems Engineer
MCU	Main Control Unit
MDA	Monochrome Display Adaptor
MDBMS	Megadatabase Management System
MDI	Multiple Document Interface
MDX	Multi-Dimensional eXpression
MEGACO	Media Gateway Control
MFC	Microsoft Foundation Classes
MFLOPS	Mega FLOPS
MG	Media Gateway
MGC	Media Gateway Controller
MGCP	Media Gateway Control Protocol
MHz	MegaHertz
MIB	Management Information Base
MIC	Microphone
MICS	Management Information & Control System
MIDI	Musical Instrument Digital Interface
MIDP	Mobile Information Device Profile
MIME	Multipurpose Internet Mail Extensions
MIPS	Millions of Instructions per Second
MIS	Management Information System
MIT	Massachusetts Institute of Technology
MITS	Micro Instrumentation Telemetry Systems
MHz	Megahertz
MM	Multimedia
MMC	1) Microsoft Management Console 2) Multi-Media Card 3) Multimedia Messaging Service
MME	Microsoft Mobile Explorer
MMU	1) Mass Memory Unit 2) Memory Management Unit
MMVF	Multimedia Video File
MMX	MultiMedia eXtensions
MO	Magneto-Optical
MOLAP	Multidimensional On Line Analitical Processing
MONET	Multiwavelenght Optical Networking
MOSFET	Transistor of effect of metal-oxide-semiconductor field
MOTO	Mail Order/Telephone Order
MP3	MPEG Layer-3 Audio
MPC	Multimedia PC
MPEG	Moving Pictures Experts Group
MPEG-1	Moving Pictures Experts Group 1
MPEG-2	Moving Pictures Experts Group 2
MPG	MPEG format file
MPOA	MultiProtocol Over ATM
MPP	Massively Parallel Processing
MPS	Message Processing Service
MQ	Message Queue
MR	Magneto Resistive
MRP	Material Requirements Software
MS	MicroSoft
MSAV	MiscroSoft AntiVirus
MSB	Most Significant Bit
MSCP	Mass Storage Control Protocol
MSDOS	Microsoft Disk Operating System
MS-DOS	ver MSDOS
MSCS	Microsoft Cluster Server
MSDN	Microsoft Developer Network
MSMP	Modeling and Simulation Master Plan
MSN	MicroSoft Network internet service
MSNF	Multiple Systems Networking Facility
MSRR	Modeling and Simulation Resource Repository
MSS	Multiprotocol Switched Services
MSTS	MicroSoft Terminal Server
MSU	Mass Storage Unit
MTBF	Mean Time Between Failures
MTTR	Mean Time To Repair
MTS	Microsoft Transaction Server
MTU	Maximum Transfer Unit
MVP	Most Valuable Product
MVS	Multiple Virtual Storage
MVT	Multiprogramming with a Variable number of Tasks
MX	Mail Exchange

Abbreviation	Full-Form – Meaning
N/A	Not Available
NAC	Network Access Control
NACK	Negative Acknowledgment
NAP	Network Access Point
NAS	Network-Attached Storage
NASA	National Aeronautics and Space Administration
NAT	Network Address Translation
NC	1) Network Computers 2) Norton Comander
NCA	Network Computing Architecture
NCB	Node Control Block
NCC	Network Control System
NCP	Network Control Program
NCSA	1) National Computer Security Association 2) National Center for Supercomputing Applications
NDD	Norton Disk Doctor
NDIS	Network Driver Interface Specification
NDS	NetWare Directory Services
NET	No Electronic Theft
NetBEUI	NetBios Extended User Interface
NetBIOS	Network Basic Input / Output System
NFS	Network File System
NGI	Next-Generation Internet
NHRP	Next Hop Resolution Protocol
NI	Non-Interlaced
NIC	1) Network Interface Card 2) Network Information Center
NiCad	Nickel Cadmium
NICE	Narrative, Immersion, Constructivist/Collaborative Environment
NIF	Network Information File
NII	National Information Infrastructure
NiMH	Nickel Metal Hydrate
NIS	Network Infomation Service
NIST	National Institute of Standards and Technologies
NLC	Natural Language Command
NLP	Natural Language Processing
NMS	Network Management System
NN	Network Node
NNTP	Network News Transfer Protocol
NOC	Network Operations Center
NOS	Network Operating System
NR	Negative Response
nrt-VBR	Non-Real-Time Variable Bit Rate
ns	nanosecond
NSA	National Security Agency (USA)
NSAPI	Netscape Server Application Programming Interface
NSF	National Science foundation
NSFNET	National Science foundation Network
NSP	Network Services Protocol
NT	Windows NT
NTFS	NT File System
NTLM	NT LAN Manager
NTONC	National Transparent Optical Network Consortium
NTP	Network Time Protocol
NTS	Windows NT Server
NTSC	National Transmission Standards Committee
NU	Norton Utilities
NVP	Network Voice Protocol

Abbreviation	Full-Form – Meaning
OAI	Open Archives Initiative
OASIS	Organization for Advancement Structured Information Sciences
OC	Optical Carrier
OC3	Optical Carrier 3
OC12	Optical Carrier 12
OC48	Optical Carrier 48
OCA	Open Communication Architectures
OCR	Optical Character Recognition
OCSP	Online Certificate Status Protocol
OCX	OLE Control Extension
ODBC	Open DataBase Conectivity
ODF	Open Document Format
ODI	1) Open Device Interface 2) Open Data link Interface
ODM	Original Design Manufacturing
ODMG	Object Database Management Group
ODU	Outdoor Unit
OE	Outlook Express
OEM	Original Equipment Manufacturing
OID	Object Identifier
OIL	Ontology Interchange Language
OKI	Open Knowledge Initiative
OL	1) On-Line 2) Open Learning 3) Ordered List
OLAP	On Line Analitical Processing
OLE	Object Linking and Embedding
OLED	Organic Light-Emitting Diode
OLL	Online Learning
OLRT	Online Real Time
OLT	Online Transactions
OLTP	On Line Transaction Processing
OMA	Object Management Architecture
OMG	Object Management Group
OMR	Optical Mark Reader
OMT	1) Object Model Template 2) Object Modeling Technology u Object Modeling Technique
ONA	Open Network Architecture
ONG	Organización No Gubernamental
OO	Object-Oriented
OOA	Object-Oriented Analysis
OOD	Object-Oriented Design
OODB	Object-Oriented Database
OODBMS	Object Oriented DBMS
OOP	Object Oriented Programming
OPAC	Online Payment and Collection
OPAC	Online Public Access Catalog
OPC	OLE for Process Control
OPSEC	Open Platform for Secure Enterprise Connectivity
OQL	Object Query Language
ORB	Object Request Broker
ORBD	Object Relational Database
ORDBMS	Object Relational DBMS
OS	Operating System
OSCAR	Open Standards for Container/Content Allowing Re-use
OSD	Open Software Description
OSE	Office Server Extensions
OSF	Open Software Foundation
OSI	1) Open Systems Interconnection 2) Open Source Initiative
OSP	Open Settlement Protocol
OSPF	Open Shortest Path First
OSS	Open Source Software
OSS	Operations Support System
OSTG	Open Source Technology Group
OTG	On-The-Go
OWL	Web Ontology Language

Abbreviation	Full-Form – Meaning
P	Parallel port
PABX	Private Automatic Branch eXchange
PAL	1) Phase Alternating Line 2) Programmable Array Logic
PAN	Personal Area Network
PAS	Pascal Source Code (file extension)
PAT	Port Address Translation
PBD	Power Builder Dynamic Library
PBE	Password-Based Encryption
PBKDF	Password-Based Key Derivation Function
PBX	Private Branch eXchange
PC	Personal Computer
PC Card	Personal Computer Card
PC/PCI	Personal Computer / PCI
PCB	Printed Circuit Board
PCI	1) Personal Computer Interface 2) Program Controlled Interruption
PCL	Printer Control Language
PCM	Personal Computer Memory
PCMCIA	Personal Computer Memory Card International Association
PCT	Private Communications Technology
PDA	Personal Digital Assistant
PDF	Portable Document Format
PDIP	Plastic Dual-In-line Package
PDM	Product Data Management
PDN	Public Data Network
PDP	Programmable Data Processor
PDU	Protocol Data Unit
PENS	Package Exchange Notification Services
PEP	Packet Exchange Protocol
PER	Packed Encoding Rules
PET	Positron Emission Tomography
PGP	Pretty Good Privacy
PHP	PHP Hypertext Preprocessor
PICMG	PCI Industrial Computer Manufacturers Group
PICS	Plataform for Internet Content Selection
PID	1) Packet Identifier 2) Process Identifier
PIM	1) Protocol – Independent Multicast 2) Personal Information Manager
PIN	Personal Identification Number
PING	Packet InterNet Groper
PIO	Pin Input/Output
PKC	Public Key Criptosystem
PKCS	Public Key Cryptography Standard
PKI	Public Key Infrastructure
PL	Perl (file extension)
PLA	Programmable Logic Array
PLC	Packet-Loss Concealment
PLC	Programmable Logic Controller
PLD	Programmable Logic Device
PL/SQL	Procedural Language SQL
PMA	Passive Member Address
PN	Part Number
PNG	Portable Network Graphics
PnP	Plug and Play
POE	Power Over Ethernet
POP	1) Post Office Protocol 2) Point Of Presence
POP3	Post Office Protocol version 3
POS	Point Of Sale
POSIX	Portable Operating System Interface
POTS	Plain Old Telephone Service
ppm	Pages Per Minute
PPP	Point-to-Point Protocol
ppp	.
PPPoE	PPP over Ethernet
PPS	Precise Positioning Service
PPT	Power Point (file extension)
PPTP	Point-to-Point Tunneling Protocol
PQF	Prefix Query Format
PR	Problem Report
PRF	Pseudo-Random Function
PRN	Printer
PROM	Programmable ROM
PS	1) PostScript 2) Presentation Services
PSDN	Packet-Switched Data Network
PSE	Personal Secure Environment
PSN	Packet-Switched Network
PSP	Program Segment Prefix
PSQL	Procedural SQL
PSR	PowerSoft Report
PSTN	Public Switched Telephone Network
PSW	Program Status Word
PSYC	Protocol for SYnchronous Conferencing
PTN	Public Telephone Network
PTR	Pointer
PU	Physical Unit
PVC	Permanent Virtual Circuit
PVD	Positive Voice Detection
PWI	Public Windows Interface
PWR	Power

Abbreviation	Full-Form – Meaning
QA	Quality Assurance
QA&C	Quality Assurance and Control
QBASIC	Quick Basic
QC	Quality Control
QDOS	Quick and Dirty Operating System
QE	Quality Engineer
QEB	Quality Engineering Branch
QED	Quod Erat Demonstrandum
QEM	Quality Engineering Memorandum
QFD	Quality Function Deployment
QNH	Atmospheric Pressure at Nautical Height
QNTY	Quantity
QOS	Quality of Service
QSXGA	Quad Super XGA
QTI	Question and Test Interoperability
QT	Quick Time
QVGA	Quarter VGA
QWERTY	Q, W, E, R, T, Y
QXGA	Quad Extended Graphics Array

Abbreviation	Full-Form – Meaning
R&D	Research and Development
RA	Relational Algebra
RAD Tools	Rapid Application Development Tools
RADIUS	Remote Authentication Dial-In User Service
RADSL	Rate-Adaptive DSL
RAID	Redundant Array of Inexpensive Disks
RAID-0	Redundant Array of Inexpensive Disks – level 0
RAID-1	Redundant Array of Inexpensive Disks – level 1
RAID-2	Redundant Array of Inexpensive Disks – level 2
RAID-3	Redundant Array of Inexpensive Disks – level 3
RAID-4	Redundant Array of Inexpensive Disks – level 4
RAID-5	Redundant Array of Inexpensive Disks – level 5
RAM	Random Access Memory
RAND	1) Random 2) Reasonable and Non-Discriminatory
RAS	Remote Access Server
RCE	Radio Control Equipment
RCL	Radio Communications Link
RCS	Revision Control System
RCST	Return Channel Satellite Terminal
RDA	Remote Database Access
RDB	Reverse-Engineering Data Base
RDBMS	Relational DataBase Management System
RDF	1) Resource Description Format 2) Resource Description Framework
RDO	Remote Data Objects
RDRAM	Rambus DRAM
RDSI	see ISDN
RE	Reverse Engineering
REST	Representational State Transfer
RF	Radio Frequency
RFC	Request For Comments
RFCOMM	Radio Frequency Communication
RFDC	Radio Frequency Data Communication
RFID	Radio Frequency Identification
RFM	Radio Frequency Monitor
RFP	Request For Proposal
RGB	Red, Green, and Blue
RI	Ring Indicator
RIA	Rich Internet Application
RIFF	Resource Interchange File Format
RIP	Routing Internet Protocol
RISC	Reduced Instruction Set Computer
RJE	Remote Job Entry
RIP	1) Routing Information Protocol 2) Raster Image Processor
RISC	Reduced Instruction Set Computer
RM	1) Reference Model 2) Resource Manager
RMI	Remote Method Invocation
RNR	Receive Not Ready
ROI	Return On Investment
ROLAP	Relational On-Line Analytical Processing
ROM	Read Only Memory
ROR	Ruby on Rails
RPC	Remote Procedure Call
RPM	Revolutions per minute
RPN	Reverse Polish Notation
RR	Receive Ready
RRD	Round Robin Database
RS	1) RISC System 2) Recommended Standard
RS/6000	RISC System 6000
RSA	Rivest, Shamir, and Adleman
RSS	Rich Site Summary
RSVP	Resource reSerVation Protocol
RTC	Public Switched Telephone Network
RTCP	Real-Time Control Protocol
RTF	Rich Text Format
RTLS	Real-Time Locating Systems
RTM	Response-Time Monitor
RTOS	Real-Time Operating System
RTP	1) Real-time Transport Protocol 2) Real-Time Protocol
RTR	Ready To Receive
RTS	1) Real-Time Strategy 2) Ready To Send 2) Request To Send
RTSP	Real-Time Streaming Protocol
RTTP	Real-Time Transaction Processing
rt-VBR	Real-Time Variable Bit Rate
RU	Request (o Response) Unit
RX	Receiver (o Receive) Data
RZ	Return-to-Zero

Abbreviation	Full-Form – Meaning
S56	Switchet 56
S-HTTP	Secure HTTP
S/M	SyncMaster
S/MIME	Secure Multipurpose Internet Mail Extensions
S/N	1) Signal-to-Noise ratio 2) Serial Number
S2K	Serials 2000
S	Serial port
SA	1) Security Association 2) System Administration
SAA	System Applications Architecture
SACD	Super Audio CD
SACK	Selective ACK
SALT	Speech Application Language Tags
SAM	Security Accounts Manager
SAMBA	Session Message Block
SAML	Security Assertions Markup Language
SAN	Storage Area Network
SAP	Service Access Point
SAR	Segmentation and Reassembly Layer
SAS	Serial Attached SCSI
SASDK	Speech Application SDK
SASL	Simple Authentication and Security Layer
SATA	Serial ATA
SAX	Simple API for XML
SB	Sound Blaster
SBC	Single Board Computer
SBC	Sub Band Codec
SBCS	Single-Byte Character Set
SC	Standard connector
SCA	System Communication Architecture
SCADA	System Control And Data Acquisition
SCB	Session Control Block
SCC	Serial Communications Controller
SCM	1) Session Control Manager 2) Source Control Management
SCO	1) Sharable Content Object 2) Synchronous Connection Oriented
SCORM	1) Shareable Content Object Reference Model 2) Shareable Courseware Object Reference Model
SCP	Session Control Point
SCS	Safety Computer System
SCSA	Signal Computing System Architecture
SCSI	Small Computer System Interface
SCSI-2	SCSI-2
SCSI-3	SCSI-3
SD	Super Density
SDDI	Shielded Distributed Data Interface
SDH	Synchronous Digital Hierarchy
SDI	Single Document Interface
SDIF	Standard Document Interchange Format
SDIO	Secure Digital Input/Output
SDK	Software Development Kit
SDKJ	Software Development Kit for Java
SDL	System Description Language
SDLC	Synchronous Data Link Control protocol
SDN	Software-Defined Network
SDP	Service Discovery Protocol
SDRAM	Synchronous Dynamic RAM
SDSL	Single-Line Digital Subscriber Line / Symmetric Digital Subscriber Line
SEC	Single Edge Contact
SET	Secure Electronic Transaction
SFS	Shared File System
SFT	System Fault Tolerance
SGI	Silicon Graphics Inc.
SGML	Standard Generalized Markup Language
SGRAM	Synchronous Graphics RAM
SHA	Secure Hash Algorithm
SHTTP	Secure HTTP
SIG	Special Interest Group
SIMD	Single Instruction Multiple Data
SIMM	Single In-Line Memory Module
SIMPLE	SIP for Instant Messaging and Presence Leveraging Extensions
SIP	Session Initiation Protocol
SIPC	Simply Interactive PC
SIS	Silicon Integrated Systems
SISA	Simulation-based Intelligent Training and Assessment
SISO	Single Input, Single Output
SKAP	Strong Key Management and Authentication Protocol
SKIP	Simple Key Management for Internet Protocol
SKOS	Simple Knowledge Organization System
SLAs	Service-Level Agreements
SLI	Scan-Line Interlacing
SLIP	Serial Line Interface Protocol
SLR	Single-Lens Reflex
SM	Session Manager
SMB	Session Message Block
SMDS	Synchronous Multimegabit Data Service
SMP	Symmetric Multiprocessing
SMPTE	Society of Motion Picture and Television Engineers
SMS	System Managed Storage
SMT	1) Surface Mount Technology 2) Symmetric Multi-Threading
SMTP	Simple Mail Transfer Protocol
SNA	Systems Network Architecture
SNMP	Simple Network Management Protocol
SNPP	Simple Network Paging Protocol
SNR	Signal/Noise Ratio
SOA	Start of Authority
SOAP	Simple Object Access Protocol
SOE	Standard Operating Environment
SOHO	Small Office Home Office
SOI	Signals of Interest
SOIC	Small-Outline Integrated Circuit
SOM	Schema Object Model
SONET	Synchronous Optical NETwork
SPARQL	Simple Protocol and RDF Query Language
SPEC	Specification
SPEC_95	Specification 95
SPF	Sender Policy Framework
SPIDs	Service Profile IDentifiers
SPP	Scalable Parallel Processing
SPS	Standard Positioning Service
SPX	Sequenced Packet eXchange
SQA	Software Quality Assurance
SQAP	Software Quality Assurance Plan
SQE	Software Quality Engineer
SQL	Structured Query Language
SRAM	Static RAM
SRM	1) Software Reference Manual 2) System Resource Manager
SRS	1) Sender Rewriting Scheme 2) Software Requirements Specification
SRW	Search and Retrieval for the Web
SS7	Signaling System No. 7
SS	Spread Spectrum
SSA	Serial Storage Architecture
SSE	Streaming SIMD Extensions
SSH	Secure Shell
SSL	Secure Socket Layer
SSML	Speech Synthesis Markup Language
SSOP	1) Security Standard Operating Procedures 2) Shrink Small Outline Package
ST	Standard Type
STD	Standard
STL	Standard Template Library
STM	Synchronous Transfer Mode
STP	Shielded Twisted Pair
STX	Start of Text
SVAPI	Speaker Verification API
SVC	Switched Virtual Circuit
SVD	Simultaneous Voice Data
SVG	Scalable Vector Graphics
SVGA	Super VGA
SVH	Spin Valve Head
SWOP	Standard Web Off-set Press
SWT	Standard Widget Toolkit
SXGA	Super XGA
SYN	Synchronization

Abbreviation	Full-Form – Meaning
T1	T-carrier channel 1
T2	T-carrier channel 2
T3	T-carrier channel 3
T4	T-carrier channel 4
T-carrier	T-carrier channel
T&E	Test and Evaluation
T/R	Transmit/Receive
TAM	Telephone Answering Machine
TAP	Telelocator Alphanumeric Protocol
TAPI	Telephony Application Programming Interface
TAR	1) Tape Archive 2) True Accept Rate
TAS	TotalNet Advanced Server
TBD	To Be Determined o To Be Done
TCM	Time-Compression Multiplexing
TCO	Total Cost of Ownership
TCP	Transmission Control Protocol
TCP/IP	Transmission Control Protocol / Internet Protocol
TDM	Time Division Multiplexing
TDMA	Time Division Multiple Access
TDP	Tag Distribution Protocol
TDS	Tabular Data Stream
TE	Terminal Equipment
TELNET	Tele Network
TFT	Thin Film Transistor
TFTP	Trivial File Transfer Protocol
TI	.
TIA	Telecommunications Industry Association
TID	Terminal Identification Number
TIFF	Tag Image File Format
TLD	1) Top Level Design 2) Top Level Domain
TLS	Transport Layer Security
TM	TradeMark
TMX	Translation Memory eXchange
TP	Transaction Processing
TQFP	Thin Quad Flat Pack
TR	1) Technical Report 2) Token Ring
TRA	Token Ring Adapter
TRC	Tuples Relational Calculus
TRIP	Telephony Routing over IP
TS	Transaction Services
TSOP	Thin Small-Outline Package
TSP	Telephony Service Providers
TSR	Terminate and Stay Resident
TSS	Telecommunications Standard Sector
TTL	Time To Live
TTL	Transistor to Transistor Logic
TTS	Text To Speech
TTY	Terminal Type
TWX	Teletypewriter Exchange
TX	Transmitter o Transmit Data
TZ	Time Zone

Abbreviation	Full-Form – Meaning
U SCSI	Ultra SCSI
U W SCSI	Ultra Wide SCSI
UART	Universal Asynchronous Receiver / Transmitter
UBR	Unspecified Bit Rate
UCAID	University Corporation for Advanced Internet Development
UCB	Unit Control Block
UCC	Uniform Code Council
UCE	Unsolicited Commercial Email
UDDI	Universal Discovery Description Integration
UDF	Universal Disk Format
UDI	Unrestricted Digital Information
UDMA	Ultra Direct Memory Access
UDP	User Datagram Protocol
UDT	Universal Development Tool
UFDA	USB Flash Drive Alliance
UHF	Ultra High Frequency
UI	User Interface
UID	Unique Identification Number
UID	User Identification
UL	1) Unordered Lists 2) UpLoad
UML	Unified Modeling Language
UMS	USB Mass Storage
UNI	User Network Interface
UNIVAC	UNIVersal Automatic Computer
UPC	Universal Product Code
UPS	Uninterruptible Power Supply
URI	Uniform Resource Identifier
URL	Universal Resource Locator
URN	Uniform Resource Name
USART	Universal Synchronous/Asynchronous Receiver/Transmitter
USB	Universal Serial Bus
UTC	Coordinated Universal Time / Temp Universel Coordonné
UTF	Unicode Transformation Format
UV	Ultraviolet
UTP	Unshielded Twisted Pair
UVGA	Ultra VGA

Abbreviation	Full-Form – Meaning
V.90	V.90 Standard
V&V	Verification and Validation
V.	CCITT Code Designation
V	Version
VA	Visual Age
VAR	1) Value-Added Reseller 2) Variable
VB	Visual Basic
VBNS	Very-high-speed Backbone Network Service Very-high Bandwidth Network Service
VBR	Variable Bit Rate
VBX	Visual Basic ControlS
VC	Virtual Channel
VCC	Virtual Channel Connections
VCD	Video CD
VCI	Virtual Channel Identifier
VCM	Virtual Channel Memory
VCP	Virtual Channel Path
VCR	Video Cassette Recorder
VCS	Version Control System
VDD	Virtual Device Driver
VDI	Video Device Interface
VDSL	Very-high-rate DSL
VDU	Video Display Unit
VESA	Video Electronics Standards Association
VGA	Video Graphics Array
VHCS	Virtual Hosting Control System
VHF	Very High Frequency
VHS	Vertical Helical Scan
VIC	Voice Interface Card
VLAN	Virtual LAN
VLB	VESA Local Bus
VLE	Virtual Learning Environment
VLIW	Very Long Instruction Words
VLSI	Very Large Scale of Integration
VM	1) Virtual Machine 2) Virtual Machine
VMD	Virtual Manufacturing Device
VML	Vector Markup Language
VMS	1) Virtual Memory System 2) Voice Messaging System
VN	Virtual Network
VoIP	Voice over IIP
VoxML	Voice Markup Language
VPN	Virtual Private Network
VQFP	Very Thin Quad Flat Package
VR	Virtual Reality
VRAM	Video RAM
VRC	Vertical Redundancy Checking
VRML	Virtual Reality Markup Language
VRU	Voice Response Unit
VSAT	Very Small Aperture Terminal
VUI	Voice User Interface

Abbreviation	Full-Form – Meaning
W3	World Wide Web
W3C	World Wide Web Consortium
W SCSI	Wide SCSI
WAI	Web Accessibility Initiative
WAN	Wide Area Network
WAP	Wireless Application Protocol
WAR	Web Archive
WBC	WideBand Channel
WBEM	Web-Based Enterprise Management
WBT	Web-Based Training
WBXML	Wireless Binary XML
WDDX	Web Distributed Data Exchange
WDM	1) Wave Division Multiplexing 2) Windows Driver Model
WebDAV	Web-based Distributed Authoring and Versioning
WEP	Wired Equivalent Privacy
WEP	Wireless Encryption Protocol
WF	Web Farming
WfM	Wired For Management
WFW	Windows For Workgroups
WG	Working Group
WHATWG	Web Hypertext Applications Technology Working Group
WiFi	Wireless Fidelity (IEEE 802.11b)
WiMAX	Worldwide Interoperability for Microwave Access
WINS	Windows Internet Naming Service
WLAN	Wireless Local Area Network
WMA	Windows Media Audio
WMF	Windows Metafile Format
WML	Wireless Markup Language
WMV	Windows Media Video
WORM	Write Once, Read Many
WP	Word Perfect
WPAN	Wireless Personal Area Network
WPG	Word Perfect Graphics
WRAM	Windows RAM
WSCI	Web Service Choreography Interface
WSCLE	Web Services Conversion Language
WSDL	Web Services Definition Language
WSFL	Web Services Flow Language
WSP	Wireless Session Protocol
WSQ	Wavelet Scalar Quantization
WVGA	Wide VGA
WWW	World Wide Web
WXGA	Wide XGA
WYSIWYG	What You See is What You Get

Abbreviation	Full-Form – Meaning
X	X Window System
X.	CCITT Recommendation Designation
x2	Times 2
XA	Extended Architecture
XACML	XML Access Control Markup Language
XAML	Extensible Application Markup Language
XAP	eXtensible Ajax Platform
XBAP	XAML Browser Applications
XDR	XML Data Reduced
xDSL	x Digital Subscriber Line
XGA	Extra VGA
XHTML	Extensible HTML
XID	Exchange Identification
XKMS	XML Key Management Specification
XLANG	Web Services for Business Process Design
XML	Extensible Markup Language
XMP	Extensible Metadata Platform
XMPP	Extensible Messaging and Presence Protocol
XP	Extreme Programming
XPS	XML Paper Specification
XQL	XML Query Language
XSD	XML Schema Definition
XSL	Extensible Stylesheet Language
XSLFO	XSL Formatting Objects
XSLT	XSL Transformations
XSS	Cross-Site Scripting
XST	Cross Site Tracing
XT	Extra Technology
XUL	Extensible User Interface Language

Abbreviation	Full-Form – Meaning
Y2K	Year 2000
YACC	Yet Another Compiler Compiler

Abbreviation	Full-Form – Meaning
ZIF	Zero Insertion Force
ZIP	Zone Information Protocol
ZIS	Zone Information Socket
ZIT	Zone Information Table

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