1 AAFI Amateur Athletics Federation of India2 AAPSO Afro-Asian People’s Solidarity Organisation3 AASU All Assam Students Union4 ABM Anti Ballistic Missile5 AC Alternate Current OR Air Conditioner6 ACC Ancillary Cadet Core7 AD Ano Domini (After the birth of Jesus)8 ADB Asian Development Bank.9 AERE Atomic Energy Research Establishment10 AGOC Asian Games Organisation Committee

11 AICC All India Congress Committee12 AICTE All India Council of Technical Education13 AIDS Acquired Immuno Deficiency Syndrome14 AIFE All India Football Federation15 AIIMS All India Institute of Medical Sciences16 AIL Aeronautics India Limited17 AIMPLB All India Muslim Personal Law Board18 AIR All India Radio (Broadcasting)19 AITUE All India Trade Union Congress20 AM Anti Meridian (Before Noon)21 ANC African National Congress22 APEC Asia Pacific Economic Cooperation23 APSC Army Postal Services Core24 ASEAN Association of South East Asian Nations25 ASLV Augmented Satellite Launch Vehicle26 ASI Archaeological Survey of India27 ASSOCHAM Associated Chamber of Commerce and Industry (India)28 ASWAC Airborne Surveillance Warning and Control29 ATS Anti Tetanus Serum30 BAMS Bachelor of Ayurvedic Medicine and Surgery31 BARC Bhabha Atomic Research Centre32 BBC British Broadcasting Corporation33 BC Before Christ (Before the birth of Jesus)34 BCG Bacillus Calmette Guerin (Anti TB Vaccine)35 BCCI Board of Control for Cricket in India36 BEL Bharat Electronics Limited37 BENELUX Belgium, Netherlands and Luxemburg38 BHEL Bharat Heavy Electronics Limited39 BIFR Board of Industrial Finance and Reconstruction (Formerly IndustrialReconstruction Finance Board)40 BIMSTEC Bangladesh, India, Myanmar, Sri Lanka, Thailand Economic Cooperation41 BIS Bureau of Indian Standards42 B Pharma Bachelor of Pharmacy43 BSF Border Security Force44 CAD Command Area Development45 CAG Comptroller and Auditor General46 CARE Cooperative for American Relief Everywhere47 CASE Commission for Alternative Sources of Energy48 CBI Central Bureau of Investigation49 CBSE Central. Board of Secondary Education50 CCEA Cabinet Committee on Economic Affairs51 CCS Cabinet Committee on Security

52 C-DAC Centre For Development of Advance Computing53 CDMA Code Division Multiple Access54 CDRI Central Drug Research Institute55 CHOGM Commonwealth Heads of Government Meeting56 CID Criminal Investigation Department57 CIS Commonwealth of Independent States58 CISF Central Industrial Security Force59 CITU Centre of Indian Trade Unions

60 CLAT Common Law Admission Test (Started May 2008)61 CNG Compressed Natural Gas62 COD Central Ordnance Depot63 COFEPOSA Conservation of Foreign Exchange and Prevention of Smuggling Act64 CPO Central Passport Organisation65 CPRI Central Power Research Institute66 CRPF Central Reserve Police Force67 CRR Cash Reserve Ratio68 CSIR Council of Scientific and Industrial Research69 CSO Central Statistical Organisation70 CTS Computerised Tomography Scanner71 CVC Central Vigilance Commission72 DDT Dichloro Diphenyle Tri-chloroethane73 DFDR ‘Digital Flight Data Recorder (Black box)’74 DIG Deputy Inspector General75 D. Lit. Doctor of Literature76 DM District Magistrate77 DMK Dravida Munetra Kazhagam78 DNA Di-oxyribo-Nucleic Acid79 DPAP ‘Drought Prone Area Programme80 DPC Dabhol Power Company82 DRDO Defence Research and Development Organisation83 DTH Direct to Home84 DVD Digital Versatile Disk85 EAS Employment Assurance Scheme86 ECD European Central Bank87 ECG Electro Cardiogram88 EEC European Economic Community89 EEG Electro Encephalogram90 ELISA Enzyme Linked Immuno Sorbent Assay91 EMF Electromotive Force92 EPABX Electronic Private Automatic Branch Exchange93 EPZ Export Processing Zone

94 ERDA Energy Research and Development Administration95 ESMA Essential Services Maintenance Act96 EVM Electronic Voting Machine97 EXIM Bank Export-Import Bank of India98 FAO Food and Agriculture Organisation99 FBI Federal Bureau of Investigation (USA)100 FBTR Fast Breeder Test Reactor

101 FCI Food Corporation of India / Fertilizer Corporation of India102 FDR Flight Data Recorder (Black Box)103 FERA Foreign Exchange Regulation Act104 FEMA Foreign Exchange Management Act105 FICCI Federation of India Chambers of Commerce and Industry106 FIPB Foreign Investment Promotion Board107 FIR First Information Report108 FRS Fellow of the Royal Society109 FTII Films and Television Institute of India

110 FTZ Free Trade Zone111 GAIL Gas Authority of India Limited112 GATT General Agreement on Tariff and Trade113 GIC General Insurance Corporation114 GMT Greenwich Mean Time115 GNLF Gorkha National Liberation Front116 GNP Gross National Product117 GPF General Provident Fund118 GPO General Post Office119 GPS Global Positioning System

120 GSI Geological Survey of India121 HAC Hindustan Aluminium Corporation122 HAL Hindustan Aeronautics Limited123 HCF Highest Common Factor124 HDFC Housing Development Finance Corporation125 HIV Human Immuno-deficiency Virus126 HMT Hindustan Machine Tools127 HUDCO Housing and Urban Development Corporation128 HYVS High Yield Variety Seeds129 IAAI International Airport Authority of India130 lAC Indian Airlines Corporation131 IAEA International Atomic Energy Agency132 IARI Indian Agricultural Research Institute133 IBRD International Bank for Reconstruction and Development (World Bank)134 ICAR Indian Council of Agricultural Research135 ICBM Inter Continental Ballistic Missile136 ICC International Cricket Council137 ICFTU International Confederation of Free Trade Unions138 ICICI Industrial Credit and Investment Corporation of India Limited139 ICJ International Court of Justice140 ICMR Indian Council of Medical Research141 ICSI Indian Company Secretaries Institute142 IDA International Development Agency143 IDBI Industrial Development Bank of India144 IDO International Defence Organisation145 IDPL Indian Drugs and Pharmaceuticals Limited146 IFA Indian Football Association147 IFCI Industrial Finance Corporation of India148 IFFI International Film Festival of India149 IFFCO Indian Farmers Fertilizers Cooperative150 IFTU International Federation of Trade Unions

152 IIS Indian Institute of Sciences153 IISCO Indian Iron and Steel Company154 IIT Indian Institute of Technology155 ILO International Labour Organisation156 IMA Indian Military Academy157 IMF International Monetary Fund158 INGCA Indira Gandhi Gallery for Culture and Art159 INS Indian Naval Ship160 INSAT Indian National Satellite161 INTELSAT International Telecommunication Satellite162 INTERPOL International Police Organisation163 INTUC Indian National Trade Union Congress164 IOC International Olympic Committee / Indian Oil Corporation165 IPC Indian Penal Code166 IPKF Indian Peace Keeping Force167 IQ Intelligence Quotient168 IRBM Intermediate Range Ballistic Missile169 IRC International Red Cross170 IRDA Insurance Regulatory Development Authority171 IRDP Integrated Rural Development Programme172 ISB Indian Standard Bureau173 ISM Indian School of Mines174 ISO International Organisation for Standardisation175 ISP Internet Services Provider176 ISRO Indian Space Research Organisation177 IST Indian Standard Time178 ITBP Indo-Tibet Border Police179 ITDC Indian Tourism Development Corporation180 ITPO Indian Trade Promotion Organisation181 ITO International Trade Organisation182 IUCN International Union for Conservation of Nature and Natural Resource183 ITUC Indian Trade Union Congress184 JMM Jharkhand Mukti Morcha

185 KG Kinder Garten186 LASER Light Amplification By Stimulated Emission of Radiation187 LIC Life Insurance Corporation of India188 LLB Bachelor of Law189 LLM Master of Law190 LMG Light Machine Gun191 LoC Line of Control (Pakistan)

192 LoAC Line of Actual Control (China)193 LPG Liquefied Petroleum Gas194 LSD Lysergic acid diethylamide195 LTTE Liberation Tigers of Tamil Elam196 MA Master of Arts197 MASER Microwave Amplification by Stimulated Emission of Radiation198 MBA Master of Business Administration199 MBBS Bachelor of Medicine and Bachelor of Surgery200 MBT Main Battle Tank

201 MCA Monetary Compensatory Allowance / Master of Computer Application202 MCC Melbourne Cricket Club203 MD Doctor of Medicine204 MFN Most Favoured Nation205 MI Military Intelligence206 MISA Maintenance of Internal Security Act207 MIT Mechachusates Institute of Technology (USA)208 MLA Member of Legislative Assembly209 MLC Member of Legislative Council210 MNC Multi National Corporation211 MRCP Member of Royal College of Physicians212 MRCS Member of Royal College of Surgeons213 MRTPC Monopoly and Restrictive Trade Practices Commission214 MODVAT Modified Value Added Tax

215 NABARD National Bank for Agricultural and Rural Development216 NACO National AIDS Control Organisation217 NAEP National Adult Education Programme218 NAFED National Agricultural and Marketing Federation219 NAFTA North American Free Trade Agreement220 NAPP Narora Atomic Power Plant221 NASA National Aeronautics and Space Administration (USA)222 NASDAQ National Association of Security Dealer’s Active Quotation223 NASSCOM National Association of Software & Service Companies224 NATO North Atlantic Treaty Organisation225 NCW National Commission for Women226 NCCR National Council for Civil Right227 NCERT National Council of Educational Research & Training228 NDA National Defence Academy229 NDDB National Dairy Development Board230 NDF National Defence Fund.231 NEERI National Environment Engineering Research Institute232 NEFA North-East Frontier Agency233 NEPA National Environment Protection Authority234 NFDC National Film Development Corporation235 NFL National Fertilizer Limited236 NHRC National Human Rights Commission237 NICO New Information and Communication Order238 NIDC National Industrial Development Corporation239 NIIT National Institute of Information Technology240 NIMHANS National Institute of Mental Health and Neuro-Sciences241 NITIE National Institute for Training in Industrial Engineering242 NMDS National Missile Defence System (US)243 NMEP National Malaria Eradication Programme244 NOIDA New Okhla Industrial Development Authority245 NPC National Productivity Council

246 NPP National Population Policy247 NPT Nuclear Non-Proliferation Treaty248 NRDC National Research and Development Corporation249 NREP National Rural Employment Programme250 NRI Non Resident Indian251 NSC National Security Council252 NSSO National Sample Survey Organisation253 NTC National Textile Corporation254 NTPC National Thermal Power Corporation255 OGL Open General Licence

256 OIL Oil India Limited257 OK All Correct258 ONGC Oil and Natural Gas Commission259 OPEC Organisation of Petroleum Exporting Countries260 PCI Press Council of India261 PCS Provincial Civil Services262 Ph. D Doctor of ‘Philosophy263 PIN Postal lndex Number264 PLO Palestine Liberation Organisation265 PM Post Meridian / Prime Minister266 POTA Prevention of Terrorism Act267 PSLV Polar. Satellite Launch Vehicle268 PTI Press Trust of India269 PRO Public Relations Officer270 PTO Please Turn Over271 PVC Poly Vinyl Chloride / Paramvir Chakra272 PVSM Param Vishisht Seva Medal273 PWD Public Work’s Department274 PWG People’s War Group275 QED Quod Erat Demonstrandum (Which was to be proved)276 QEF Quod Erat Faciendum (Which was to be done)277 QEI Quod Erat Inveniendum (Which was to be found)278 QMG Quarter Master General279 RADAR Radio Angle Direction and Range280 RAW Research and Analysis Wing281 R & D Research and Development282 RBI Reserve Bank of India283 RCC Reinforced Cement Concrete284 RDX Research Developed Explosive285 RIMC Rashtriya Indian Military College286 RMS Railway Mail Service287 RLEGP Rural Landless Employment Guarantee Programme288 RNA Ribonucleic Acid289 RPM Revolutions Per Minute290 RSS Rashtriya Swayamsevak Sangh291 RTO Regional Transport Officer292 SAARC South Asian Association for Regional Cooperation293 SAC Space Application Centre294 SAFTA South Asian Free Trade Agreement295 SAI Sports Authority of India296 SAIL Steel Authority of India Limited

297 SAPTA South Asian Preferential Trade Arrangement298 SARS Severe Acute Respiratory Syndrome299 SC Security Council/Supreme Court300 SCI Shipping Corporation of India

301 SCOPE Standing Conference of Public Enterprises302 SCRA Special Class Railway Apprentice303 SDR Special Drawing Rights304 SEBI Security Exchange Board of India305 SGPC Siromani Gurudwara Prabandhak Committee306 SHAR Shri Harikota Range

307 SIDBI Small Industries Development Bank of India308 SIS Secret Intelligence Service (U.K)309 SITA Suppression of .Immoral Traffic in Women and Girls Act310 SLV Satellite Launch Vehicle311 SPCA Society for the Prevention of Cruelty of Animals312 SPICMC Society for the Promotion of Indian Classical music and culture313 STARS Satellite Tracking and Ranging Station314 STD Subscribers Trunk Dialing315 STPI Software Technology Parks of India316 SWAPO South West African People’s Organisation317 TA Travelling Aliowance / Territorial Anmy318 TELCO Tata Engineering and Locomotive Company319 TELEX Teleprinter Exchange320 TISCO Tata Iron and Steel Company Limited

321 TNT Tri-nitro-toluene322 TOEFL Test of English as a Foreign Language323 TRAI Telecom Regulatory Authority of India324 TRIPS Trade Related Intellectual Property Rights325 TTE Travelling Ticket Examiner326 TTFI Table Tennis Federation of India327 TWA Trans World Airlines (USA)328 UDC Upper Division Clerk329 UFO Unidentified Flying Object330 UGC University Grants Commission331 UHT Ultra High Temperature332 ULFA United Liberation Front of Assam333 UNASUR Union of South American Nations (Spanish: Unión de NacionesSuramericanas)334 UNCTAD United Nations Conference on Trade and Development335 UNDP United Nations Development Programme336 UNEF United Nations Emergency Force337 UNEP United Nations Environment Programme338 UNESCO United Nations Economic Social and Cultural Organisation339 UNFPA United Nations for Population Activities340 UNHCR United Nations High Commission for Refugees341 UNI United News of India342 UNICEF United Nations International Children’s Emergency Fund343 UNO United Nations Organisation344 UPS Uninterrupted Power Supply345 UPSC Union Public Service Commission346 USSR Union of Soviet Socialist Republic347 UTI Unit Trust of India348 VAT Value Added Tax349 VDIS Voluntary Disclosure of Income Scheme350 VC Vice-Chancellor / Victoria Cross351 VIP Very Important Person352 VPP Value Payable Post353 VRS Voluntary Retirement Scheme354 VSNL Videsh Sanchar Nigam Limited355 VSSC Vikram Sarabhai Space Centre356 WEF World Economic Forum357 WHO World Health Organisation358 WILL Wireless in Local Loop359 WMO World Meteorological Organisation360 WWF World Wild Life Fund

361 WPI Wholesale Price Index362 WTO World Trade Organisation363 WWF World Wild Life Fund for Nature364 WWW World Wide Web365 YMCA Young Men’s Christians Association366 YWCA Young Women’s Christians Association367 ZBB Zero Based Budgeting368 ZSI Zoological Survey of India

ABBREVIATIONS ASKED IN VARIOUS PSC EXAMINATIONS1. AIDS Acquired Immune Deficiency Syndrome2. BDO Block Development Officer3. BSF Border Security Force4. LPG Liquefied Petroleum Gas5. COFEPOSA Conservation of Foreign Exchange and Prevention of Smuggling Act6. CD Compact Disc7. CARE Co-operative for American Relief Everywhere8. CSO Central Statistical Organisation9. ESMA Essential Services Maintenance Act10. ZPG Zero Population Growth11. GATE Graduate Aptitude Test in Engineering12. HUDCO Housing and Urban Development Corporation13. ILO International Labour Organization14. NSE National Securities Exchange15. VIRUS Vital Information Resources Under Siege16. SAARC South Asian Association for Regional Co-operation17. FRCS Fellow of Royal College of Surgeons