Originally Posted by Mazhar Hayat Awan

Abbreviation Stand for
SONAR- Sound Navigation And Ranging
LIDAR - LIght Detection And Ranging
LORAN - Long-Range Navigation
MASER - Microwave Amplification Of Stimulated Emission Of Radiation
CCTV - Closed Circuit Television
AWACS - Airborne Warning And Control System
MAF - Mass Air Flow
STP - Standard Temperature & Pressure
PLO - Palestine Liberation Organization
MEV - Mega (Million) Electron-Volts.
BEV - Billion Electron Volts
POLICE - Protection Of Life and Investigating Criminals Establishment
IBM - International Business Machines Corporation
DNA - DeoxyriboNucleic Acid
FTP - File Transport Protocol
HTML - HyperText Markup Language
LAN - Local Area Network
URL - Uniform Resource Locator
USB - Universal Serial Bus
UV - Ultraviolet
WBC - White Blood Cell
RBC - Red Blood Cell Count
CBC - Complete Blood Count
ICBM - Intercontinental Ballistic Missile
UAS - Unmanned Aircraft System
RTB - Return To Base
NVG -Night Vision Goggles
SAM -Surface to Air Missile
WMD -Weapons of Mass Destruction
NASA -National Aeronautics and Space Agency
IP - Int-ernet Protocol
BIOS - Basic Input Output System
ATM - Asynchronous Transfer Mode
Fe - Iron
Au - Gold
FIR - First Information Report
SAARC - South Asian Association for Regional Cooperation
WFP - World Food Programme
WHO - World Health Organization
ADB - Asian Development Bank
KBD - Kala Bagh Dam
IEEE - Institute of Electrical and Electronics Engineers

These are the acronyms which are generally set in the FPSC past tests. I am also working on Security Mcqs and will share shortly when ready.