| A |
| AARRO | Afro-Asian Rural Reconstruction Organization. |
| ABC | Atomic, Bacteriological and Chemical Weapons. |
| ABC | Argentina, Brazil, Chile. |
| ABCD | American, British, Chinese and Dutch Allied Forces. |
| ABM | Anti-Ballistic Missile. |
| ABS | American Bureau of Shipping. |
| ACA | Allied Control Authority. |
| ACAST | Advisory Committee on the Application of Science and Technology for Development. |
| ACCHAN | Allied Command Channel. |
| ACE | Allied Command Europe. |
| ACLANT | Allied Command Atlantic. |
| ACP | African, Caribbean and Pacific Countries. |
| ACT | Australian Capital Territory. |
| ADELA | Atlantic Development Group for Latin America. |
| ADP | Automatic Data Processing. |
| AEDF | Asian Economic Development Fund. |
| AGM | Air-to-Ground Missile. |
| AGRIS | International Information System for the Agricultural Sciences and Technology. |
| AID | (US) Agency for International Development. |
| AIDS | Acquired Immunodeficiency Syndrome. |
| AIFTA | Anglo-Irish Free Trade Agreement. |
| ALCM | Air-Launched Cruise Missile. |
| ALGOL | Algorithmic Language. |
| AMGOT | Allied Military Government of Occupied Territories. |
| AMU | Asian Monetary Unit. |
| ANF | Atlantic Nuclear Forces. |
| ANZAC | Australia and New Zealand Army Corps. |
| APO | Asian Productivity Organization. |
| ASBM | Air-to-Surface Ballistic Missile. |
| ASEAN | Association of Southeast Asian Nations. |
| ASIL | American Society of International Law. |
| ASM | Air-to-Surface Missiles. |
| ASPAC | Asian and Pacific Council. |
| ASW | Anti-Submarine Warfare. |
| AWACS | Airborne Warning and Control System. |
| B |
| BAC | British Air Corporation. |
| BIS | Bank for International Settlements. |
| BMD | Ballistic Missile Defence. |
| BW | Bacteriological Weapons. |
| C |
| CACM | Central American Common Market. |
| CARE | Co-operative for American Relief Everywhere. |
| CARICOM | Caribbean Community. |
| CARIFTA | Caribbean Free Trade Association. |
| CBU | Cluster Bomb Unit. |
| CENTO | Central Treaty Organization. |
| CIA | Central Intelligence Agency. |
| CIF | Cost, Insurance, Freight. |
| COBOL | Common Business-Oriented Language. |
| COMECON | Council for Mutual Economic Assistance (CMEA). |
| COMINFORM | Information Bureau of the Communist and Workers' Parties. |
| COMINTERN | Communist International. |
| COMISCO | Committee of International Socialistic Conferences. |
| COMITEXTIL | Co-ordinating Committee of the Textile Industry. |
| COMSAT | Commercial Satellite Corporation. |
| COSPAR | Committee for Space Research. |
| CPSU | Communist Party of the Soviet Union. |
| CREST | Committee of Scientific and Technological Research. |
| CROWCASS | Criminals of War Commission. |
| CSCE | Conference of Security and Co-operation in Europe. |
| CSTD | Committee on Science and Technology for Development. |
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