Important Abbreviations for Compitetive exams:

Important Abbreviations for Compitetive exams: 

2GL—Second-Generation Programming Language
3GL—Third-Generation Programming Language
4GL—Fourth-Generation Programming Language
5GL—Five-Generation Programming Language
AAA—Authentication Authorization, Accounting
AAL—ATM Adaptation Layer
ABR—Available Bitrate
ALGOL—Algorithmic Language
ALU—Arithmetic and Logical Unit
ANSI—American National Standards Institute
ARPANET—Advanced Research Projects Agency 
Network
ASCII—American Standard Code for Information 
Interchange
ASP—Active Server Pages
BASIC—Beginner's All-Purpose Symbolic 
Instruction Code
CAPTCHA—Completely Automated Public Turing 
Test to tell Computers and Humans Apart
CDMA—Code Division Multiple Access
CD-R—CD-Recordable
CD-ROM—CD Read-Only Memory
CD-RW—CD-Rewritable
COBOL—Common Business-Oriented Language
COMPUTER-Common Operating Machine 
Particularly Used for Trade, Education, and 
Research
DBMS—Database Management System
DVD—Digital Versatile Disc
DVD—Digital Video Disc
DVD-R—DVD-Recordable
DVD-ROM—DVD-Read Only Memory
DVD-RW—DVD-Rewritable
DVI—Digital Visual Interface
DVR—Digital Video Recorder
EDSAC—Electronic Delay Storage Automatic
Calculator
EDVAC—Electronic Discrete Variable Automatic 
Computer
EEPROM—Electronically Erasable Programmable 
Read-Only Memory
E-mail—Electronic mail
ENIAC—Electronic Numerical Integrator And 
Computer
EPROM—Erasable Programmable Read-Only 
Memory
FDD—Floppy Disk Drive
GUI—Graphical User Interface
HD—High Density
HDD—Hard Disk DriveHTML—Hypertext Markup Language
HTTP—Hypertext Transfer Protocol
HTTPd—Hypertext Transport Protocol Daemon
IC—Integrated Circuit
I/O—Input/output
IP—Internet Protocol
ISO—International Organization for 
Standardization
ISP—Internet Service Provider
KB—Keyboard
Kb—Kilobit
KB—Kilobyte
KVM—Keyboard, Video, Mouse
LCD—Liquid Crystal Display
LCR—Least Cost Routing
LAN—Local Area Network
LIFO—Last In First Out
MAC—Media Access Control
MAN—Metropolitan Area Network
MANET—Mobile Ad-Hoc Network
MAPI—Messaging Application Programming 
Interface
Mb—Megabit
MB—Megabyte
MHz—Megahertz
MOSFET—Metal-Oxide Semiconductor Field 
Effect Transistor
MS-DOS—Microsoft DOS
MT—Machine Translation
MTA—Mail Transfer Agent
MVS—Multiple Virtual Storage
MX—Mail exchange
MXF—Material Exchange Format
OS—Operating System
OSS—Open-Source Software
PAN—Personal Area Network
PAP—Password Authentication Protocol
PERL—Practical Extraction and Reporting 
Language
PHP—PHP: Hypertext Preprocessor
QDR—Quad Data Rate
RAID—Redundant Array of Independent Disks
RDBMS—Relational Database Management 
System
RISC—Reduced Instruction Set Computer
SAN—Storage Area Network
SAX—Simple API for XML.
SQL—Structured Query Language
SRAM—Static Random Access Memory
TCP/IP—Transmission Control Protocol/Internet 
Protocol
TTL—Transistor-Transistor Logic
UML—Unified Modeling Language
USB—Universal Serial Bus
VLAN—Virtual Local Area Network
XHTML—eXtensible Hypertext Markup Language
XML—eXtensible Markup Language