There are many useful abbreviations which may help you in future,it will also help you in your competitive exams:
DO READ IT CAREFULLY:
DVX:DivX video
HTML:Hyper Text Markup Language
WML:Wireless Markup Language
CD:Compact Disk
DVD:Digital Versatile Disk
CRT:Cathode Ray Tube
DAT:Digital Audio Tape
DOS:Disk Operating System
GUI:Graphical User Interface
TCP:Transmission Control Protocol
UPS:Uninterrupted Power supply
HSDPA:High speed Downlink Packet Access
EDGE:Enhanced Data rate for GSM Evolution
VHF:Very High Frequency
UHF: Ultra High Frequency
GPRS: General Packet Radio Service
WAP:Wireless Application Protocol
ARPANET:Advanced Research Project Agency Network
IBM: International Business Machines
HP: Hewlett Packard
AM/FM: Amplitude/Frequency Modulation
LAN: Local Area Network
WLAN: Wireless Local Area Network