| ABC | Air Bridge to Canada |
| ACE | Allied Command Europe |
| AEC | Atomic Energy Commission (US) |
| AECB | Atomic Energy Control Board |
| AECL | Atomic Energy of Canada Limited |
| AR(Q) | Annual Review (Questionnaire) (NATO) |
| ASW | Antisubmarine Warfare |
| AVRO | A.V. Roe & Co. Ltd. |
| AWX | All Weather Aircraft Interceptor |
| BOAC | British Overseas Airways Corporation |
| BOMARC | Boeing-Michigan Aeronautical Centre |
| BWI | British West Indies |
| BWIA | British West Indies Airways |
| CANDU | Canadian Deuterium Uranium |
| CBC | Canadian Broadcasting Corporation |
| CCOS | Chairman, Chiefs of Staff |
| CCTA | Commission for Technical Co-operation in Africa South of the Sahara |
| CDA | Combined Development Agency |
| CDC | Cabinet Defence Committee |
| CDFC | Commonwealth Development Finance Company |
| CDU | Christlich-Demokratische Union [Christian Democratic Union] (Federal Republic of Germany) |
| CEA | Central Electricity Authority (UK) |
| CICT | Commission on International Commodity Trade |
| CINCENT | Commander-in-Chief, Allied Forces, Central Europe |
| CINCHAN | Commander-in-Chief Channel and Southern North Sea |
| CIR | Canada-India Reactor |
| CJS | Canadian Joint Staff |
| CMMA | Canadian Metal Mining Association |
| CNI | Centre national des indépendants et des paysans (National Centre of Independents and Peasants) |
| CNR | Canadian National Railways |
| CNS | Canadian National Steamships |
| CN(WI)S | Canadian National (West Indies) Steamships |
| COCOM | Coordinating Committee on Export Controls |
| CPA | Canadian Pacific Airlines |
| CRO | Commonwealth Relations Office (UK) |
| DDE | escort destroyer |
| DDP | Department of Defence Production |
| DDR | Deutsche Demokratische Republik (German Democratic Republic) |
| DEA | Department of External Affairs |
| DEC | Dollar Exports Council |
| DG | Director General |
| DM | Deutsche Mark |
| DSTB | Dollar Sterling Trade Board |
| DSTC | Dollar Sterling Trade Council |
| DOT | Department of Transport |
| ECAFE | Economic Commission for Asia and the Far East (UN) |
| ECOSOC | Economic and Social Council of United Nations |
| ECSC | European Coal and Steel Community |
| EDC | European Defence Community |
| EEC | European Economic Community |
| EFTA | European Free Trade Area |
| ENEA | Ente Nazionale per l'Energia Atomica (Italy) |
| EOKA | Ethniki Organosis Kyprion Agoniston (National Organization of Cypriot Fighters) |
| EPU | European Payments Union |
| ETAP | Expanded Technical Assistance Program (UN) |
| EURATOM | European Atomic Energy Community |
| FAMA | Foundation for Mutual Assistance in Africa South of the Sahara (Fondation pour l'assistance mutuelle en Afrique au sud du Sahara) |
| FAO | Food and Agriculture Organization |
| FLN | Front de libération nationale (National Liberation Front) |
| FO | Foreign Office (UK) |
| FRUS | Foreign Relations of the United States |
| FTA | Free Trade Area |
| F.O.D. | Free of Damage |
| GATT | General Agreement on Tariffs and Trade |
| GDR | German Democratic Republic |
| GMT | Greenwich Mean Time |
| GNP | Gross National Product |
| HQ | Headquarters |
| IAEA | International Atomic Energy Agency |
| IAEC | International Atomic Energy Committee |
| IBRD | International Bank for Reconstruction and Development |
| ICA | International Cooperation Administration |
| ICAO | International Civil Aviation Organization |
| ICBM | Intercontinental Ballistic Missile |
| ICCICA | Interim Co-Ordinating Committee for International Commodity Arrangements |
| ICEM | Intergovernmental Committee for European Migration |
| ICRP | International Commission on Radiological Protection |
| ICSC | International Commission for Supervision and Control |
| IDF | Interceptor Day Fighter |
| IFC | International Finance Corporation (UN) |
| ILC | International Law Commission |
| ILO | International Labour Organization |
| IMF | International Monetary Fund |
| INTEL | Intelligence |
| IRBM | Intermediate-Range Ballistic Missile |
| IRO | International Refugee Organization |
| ISA | International Sugar Agreement |
| JIB | Joint Intelligence Bureau |
| MAAG | Military Assistance Advisory Group (US) |
| MFN | Most Favoured Nation |
| M.P. | Member of Parliament |
| MRP | Mouvement républicain populaire (Popular Republican Movement) |
| NAC | North Atlantic Council |
| NATO | North Atlantic Treaty Organization |
| NCCU | National Conference of Canadian Universities |
| NMA | NATO Military Authorities |
| NORAD | North American Air Defence |
| NPD | Nuclear Power Demonstration |
| NPP | Nuclear Power Plant |
| NRX | National Research Experimental |
| NZ | New Zealand |
| OAS | Organization of American States |
| OEEC | Organization for European Economic Cooperation |
| OGL | Open General Licence |
| OTC | Organization for Trade Cooperation (GATT) |
| PC(O) | Privy Council (Office) |
| PIDC | Pakistan Industrial Development Corporation |
| RAF | Royal Air Force (UK) |
| RCAF | Royal Canadian Air Force |
| RCN | Royal Canadian Navy |
| RPF | Rassemblement du peuple français (Rally of the French People) |
| SACEUR | Supreme Allied Commander, Europe (NATO) |
| SACLANT | Supreme Allied Commander, Atlantic (NATO) |
| SAGE | Semi-automatic Ground Environment |
| SEATO | Southeast Asia Treaty Organization |
| SFIO | Section française de l'internationale ouvrière |
| SHAPE | Supreme Headquarter, Allied Powers, Europe (NATO) |
| SITC | Standard International Trade Classification |
| SPD | Sozialdemokratische Partei Deutschlands [Social Democratic Party of Germany] (Federal Republic of Germany) |
| SPP | Special Projects Programme |
| SPUR | Special Programme for Under-Developed Regions |
| SUNFED | Special United Nations Fund for Economic Development (Fonds spécial des Nations Unies pour le développement économique) |
| TAB | Technical Assistance Board |
| TAC | Technical Assistance Committee (UN) |
| TAF | Tactical Air Force |
| TCA | Trans-Canada Airlines |
| TCC | Temporary Council Committee (NATO) |
| TLP | Trade Liberalization Plan |
| UAR | United Arab Republic |
| UCWI | University College of the West Indies |
| UDSR | Union démocratique et socialiste de la résistance (Democratic and Socialist Union of the Resistance) |
| UDSR-RGR | Union démocratique et socialiste de la résistance-rassemblement des gauches républicaines (Democratic and SocialistUnion of the Resistance-Assembly of the Republican Left) |
| UK | United Kingdom |
| UKAEA | United Kingdom Atomic Energy Authority |
| UN | United Nations |
| UNCURK | United Nations Commission for Unification and Rehabilitation of Korea |
| UNEF | United Nations Emergency Force |
| UNESCO | United Nations Educational, Scientific and Cultural Organization |
| UNGA | United Nations General Assembly |
| UNICEF | United Nations International Children's Emergency Fund |
| UNHCR | United Nations High Commissioner for Refugees |
| UNREF | United Nations Refugee Fund |
| UNRRA | United Nations Refugee and Relief Agency |
| UNRWA | United Nations Relief and Works Agency for Palestine Refugees in the Near East |
| UNTAA | United Nations Technical Assistance Administration |
| UPA | Uranium Producers Association |
| USA | United States of America |
| USAEC | United States Atomic Energy Commission |
| USAF | United States Air Force |
| USSEA | Under-Secretary of State for External Affairs |
| USSR | Union of Soviet Socialist Republics |
| WEU | Western European Union |
| WFUNA | World Federation of United Nations Associations |
| WHO | World Health Organization |
| WOGL | World Open General Licence |