A list of most used IT abbreviations are as follows:

also, see a complete list of full forms.

Short FormStands forFull Form
AJAXStands forAsynchronous JavaScript and XML
APIStands forApplication Programming Interface
APKStands forAndroid Application Package
ASPStands forActive Server Page
ASCIIStands forAmerican Standard Code for Information Interchange
ATAStands forAdvanced Technology Attachment & Parallel Advanced Technology Attachment
BASICStands forBeginner’s All-Purpose Symbolic Instruction Code
BIOSStands forBasic Input Output System
CNCStands forComputerized Numerical Control
CPUStands forCentral Processing Unit
DNSStands forDomain Name System
DTPStands forDesk-Top Publishing, Distributed Transaction Processing
EJBStands forEnterprise Java Bean
ICTStands forInformation and Communications Technology
ITESStands forInformation Technology Enabled Services
ITStands forInformation Technology
HTMLStands forHyper Text Markup Language
HTTPStands forHyper Text Transfer protocol
JPGStands forJoint Photographic Experts Group
MMSStands forMultimedia Messaging Service
PDFStands forPortable Document Format
PHPStands forHypertext Preprocessor (earlier called, Personal Home Page)
RIPStands forRest In Peace, Routing Information Protocol
RSSStands forReally Simple Syndication, Rashtriya Swayamsevak Sangh
SEOStands forSearch Engine Optimization
SIMStands forSubscriber Identity Module
SMSStands forShort Message Service
SQLStands forStructured Query Language
URLStands forUniform Resource Locator
USBStands forUniversal Serial Bus
VIRUSStands forVital Information Resources Under Seize
WIFIStands forWireless Fidelity
WWWStands forWorld Wide Web
XMLStands foreXtensible Markup Language
XMPPStands forExtensible Messaging and Presence Protocol