A
| ABM | Anti Ballistic Missile |
| AC | Alternate Current/ Ashok Chakra/ Air Conditioner/ Antarctic Club |
| ACC | Auxiliary Cadet Core |
| AD | Ano Domini (After the birth of jesus) |
| ADB | Asian Development Bank |
| AERE | Atomic Energy Research Establishment |
| AICC | All India Congress Committee |
| AICTE | All India Council of Technical Education |
| AIDS | Acquired Immuno Deficiency Syndrome |
| AIIMS | All India Institute of Medical Sciences |
| AIMPLB | All India Muslim Personal Law Board |
| AIR | All India Radio (Broadcasting) |
| AITUC | All India Tread Union Congress |
| AM | Anti Meridian (Before Noon) |
| APEC | Asia Pacific Economic Cooperation |
| APSC | Army Postal Services Core |
| ASEAN | Association of South East Asian Nations |
| ASLV | Augmented Satellite Launch Vehicle |
| ASI | Archaeological Survey of India |
| ASSOCHAM | Associated Chamber of Commerce and Industry (India) |
| ASWAC | Airborne Surveillance Warning and Control |
| ATS | Anti Tetanus Serum |
B
| BAMS | Bachelor Of Ayurvedic Medicine and Surgery |
| BARC | Bhabha Atomic Research Centre |
| BBC | British Broadcasting Corporation |
| BC | Before Christ (Before the birth of Jesus) |
| BCG | Bacillus Calmette Guerin (Anti TB Vaccine) |
| BCCL | Board of Control for Cricket of India |
| BEL | Bharat Electronics Limited |
| BENELUX | Belgium, Netherlands and Luxemburg |
| BHEL | Bharat Heavy Electricals Limited |
| BIFR | Board of Industrial Finance and Reconstruction (Formerly Industrial Reconstruction Finance Board) |
| BIMDTEC | Bangladesh, India, Myanmar, Sri Lanka, Thailand Economic Cooperation |
| BIS | Bureau of India Standards |
| B PHARMA | Bachelor of Pharmacy |
| BSF | Border Security Force |
C
| CAD | Command Area Devlopment |
| CAG | Comptroller and Auditor General |
| CARE | Cooperative for American Relief Everywhere |
| CAT | Central Administrative Tribunal, Computerised Axial Tomography |
| CAZRI | Central Arid Zone Research institute |
| CBI | Central Bureau of Investigation |
| CBSE | Central Board of Secondary Education |
| CCEA | Cabinet Committee on Economic Affairs |
| CCS | Cabinet Committee on Security |
| C-DAC | Centre For Development of Advance Computing |
| CDMA | Code Division Multiple Access |
| CDRI | Central Drug Research Institute |
| CDS | Compulsory Deposit Scheme |
| CHOGM | Commonwealth Heads of Government Meeting |
| CID | Criminal Investigation Department |
| CIS | Commonwealth of Independent States |
| CISF | Central Industrial Security Force |
| CITU | Central of Indian Trade Unions |
| CNG | Compressed Natural Gas |
| COD | Central Ordnance Depot |
| COFEPOSA | Conservation of Foreign Exchange and Prevention of Smuggling Act |
| CPO | Central Passport Organisation |
| CPRI | Central Power Research Institute |
| CRPF | Central Reserve Police Force |
| CRR | Cash Reserve Ratio |
| CSIR | Council of Scientific and Industrial Research |
| CSO | Central Statistical Organisation |
| CTS | Computerised Tomography Scanner |
| CVC | Central Vigilance Commission |
D
| DDT | Dichloro Diphenyle Tri-chloroethane |
| DFDR | Digital Flight Data Recorder (Black box) |
| DIG | Deputy Inspector General |
| D. Lit | Doctor of Literature |
| DM | District Magistrate |
| DMK | Dravida Munetra Kazhagam |
| DNA | Di-oxyribo-Nucleic Acid |
| DPAP | Drought Prone Area Programme |
| DPC | Dabhol Power Company |
| DPSA | Deep Penetration Strike Aircraft |
| DRDO | Defence Research Development Organisation |
| DTH | Direct to Home |
| DVD | Digital Versatile Disk |
E
| EAS | Employment Assurance Scheme |
| ECB | European Central Bank |
| ECG | Electro Cardiogram |
| EEC | European Economic Community |
| ELISA | Enzyme Linked Immuno Sorbent Assay |
| EMF | Electromotive Force |
| EPABX | Electronic Private Automatic Branch Exchange |
| EPZ | Export Processing Zone |
| ERDA | Energy Research and Development Administration |
| ESMA | Essential Services Maintenance Act |
| EVM | Electronic Voting Machine |
| EXIM Bank | Export-Import Bank of India |
F
| FAO | Food and Agriculture Organisation |
| FBI | Federal Bureau of Investigation |
| FBTR | Fast Breeder Test Reactor |
| FCI | Food Corporation of India/Fertilizer Corporation of India |
| FDR | Flight Data Recorder (Bank Box) |
| FERE | Foreign Exchange Regulation Act |
| FEMA | Foreign Exchange Management Act |
| FICCI | Federation of India Chambers of Commerce and Industry |
| FIPB | Foreign Investment Promotion Board |
| FIR | First Information Report |
| FRS | Fellow of the Royal Report |
| FTZ | Free Trade Zone |
G
| GAAR | General Anti-Avoidance Rules |
| GAIL | Gas Authority of India Limited |
| GATT | General Agreement on Tariff and Trade |
| GIC | General Insurance Corporation |
| GMT | Greenwich Mean Time |
| GNP | Gross National Product |
| GPF | General Provident Fund |
| GPO | General Post Office |
| GPS | Global Positioning System |
| GSI | Geological Survey of India |
H
| HAC | Hindustan Aluminium Corporation |
| HAL | Hindustan Aeronautics Limited |
| HCF | Highest Common Factor |
| HDFC | Housing Development Finance Corporation |
| HIV | Human Immuno-deficiency Virus Corporation |
| HMT | Hindustan Machine Tools |
| HUDCO | Housing and Urban Development Corporation |
| HYVS | High Yield Variety Seeds |
I
| IAAI | International Airport Authority of India |
| IAC | Indian Airlines Corporation |
| IAEA | International Atomic Energy Agency |
| IARI | Indian Agricultural Research Institute |
| IBRD | International Bank for Reconstruction and Development (World Bank) |
| ICAR | Indian Council of Agricultural Research |
| ICBM | Inter Continental Ballistic Missile |
| ICC | International Cricket Council |
| ICIC | Industrial Credit and Investment Corporation of India Limited |
| ICJ | International Court of Justice |
| ICSI | Indian Company Secretaries Institute |
| IDA | International Development Agency |
| IDBI | Industrial Development Bank of India |
| IDPL | Indian Drugs and Pharmaceuticals Limited |
| IFA | Indian Football Association |
| IFCI | Industrial Finance Corporation of India |
| IFFI | International Film Festival of India |
| IFFCO | Indian Farmers Fertilizers Cooperative |
| IFTU | International Federation of Trade Unions |
| IIPA | Indian Institute of Public Administration |
| IIS | Indian Institute of Sciences |
| IISCO | India Iron and Steel Company |
| IIT | Indian Institute of Technology |
| ILO | International Labour Organisation |
| IMA | Indian Military Academy |
| IMF | International Monetary Fund |
| INS | Indian Naval Ship |
| INSAT | Indian National Satellite |
| INTERPOL | International Police Organisation |
| INTUC | Indian National Trade Union Congress |
| IOC | International Olympic Committee/Indian Oil Corporation |
| IPC | Indian Penal Code |
| IPKF | Indian Peace Keeping Force |
| IQ | Intelligence Quotient |
| IRBM | Intermediate Range Ballistic Missile |
| IRC | International Red Cross |
| IRDA | Insurance Regulatory Development Authority |
| IRDP | Integrated Rural Development Programme |
| ISB | Indian Standard Bureau |
| ISM | Indian School of Mines |
| ISO | International Organisation for Standardisation |
| ISP | Internet Services Provider |
| ISRO | Indian Space Research Organisation |
| IST | Indian Standard Time |
| ITBP | Indo-Tibet Border Police |
| ITDC | Indian Tourism Development Corporation |
| ITPO | Indian Trade Promotion Organisation |
| ITO | International Trade Organisation |
| ITUC | Indian Trade Union Congress |
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