| ABM | Anti Ballistic Missiles |
| ADF | Asian Development Fund |
| AERE | Atomic Energy Research Establishment |
| AFSPA | Armed Forces Special Power Act |
| AGOC | Asian Games Organising Committee |
| AIDS | Acquired Immuno Deficiency Syndrome |
| AIIMS | All India Institute of Medical Sciences |
| ALH | Advanced Light Helicopter |
| APPLE | Ariane Passenger Payload Experiment |
| APEC | Asia-Pacific Economic Cooperation |
| ASAT | Anti-Satellite weapon |
| ASIAN | Association of Southeast Asian Nations |
| ASCI | Advanced Strategic Computing Initiative |
| ASLV | Augmented Satellite Launch Vehicle |
| ASI | Archaeological Survey of India |
| ATM | Automated Teller Machine |
| AVES | Acute Viral Encephalitic Syndrome |
| BC SBI | Banking Codes and Standard Board of India |
| BARC | Bhabha Atomic Research Centre |
| BBC | British Broadcasting Corporation |
| BCG | Bacillus Calmette Guerin |
| BCTT | Banking Cash Transaction Tax |
| BCCI | Board for Control of Cricket in India |
| BENELUX | Belgium, Netherlands, Luxembourg |
| BIMSTEC | Bay of Bengal Initiative for Multisectoral Technical and Economic Cooperation |
| BIS | Bureau of Indian Standards |
| BMJD | Ballistic Missile Defence System |
| BPO | Business Process Outsourcing |