| ABC | Air Bridge to Canada |
| A/C | Air Commodore |
| ADC | Air Defense Command (US) |
| AEC | Atomic Energy Commission (US) |
| AECB | Atomic Energy Control Board |
| AECL | Atomic Energy of Canada Limited |
| AEW&C | Airborne Early Warning and Control |
| AFHQ | Air Force Headquarters (US) |
| AFP | Agence France-Presse |
| AMTORG | Amerikanskaya torgovaya [Amtorg Trading Corporation] USSR |
| AP | Associated Press |
| AVM | Air Vice-Marshal |
| BBC | British Broadcasting Corporation |
| BCP | Bureau du Conseil privé |
| BIS | Bank for International Settlements |
| BNA | British North America |
| BOAC | British Overseas Airways Corporation |
| BOMARC | Boeing-Michigan Aeronautical Centre |
| CAE | Canadian Aviation Electronics |
| CANAC | Permanent Delegation of Canada to the North Atlantic Council |
| CANDEL | Canadian Delegation to the General Assembly of United Nations |
| CAS | Chief of Air Staff |
| CB | Communications Branch, National Research Council |
| CBC(-IS) | Canadian Broadcasting Corporation(-International Service) |
| CCC | Commodity Credit Corporation (US) |
| CCF | Cooperative Commonwealth Federation |
| CCOS | Chairman, Chiefs of Staff |
| CDC | Cabinet Defence Committee |
| CDU | Christlich-Demokratische Union [Christian Democratic Union] (West Germany) |
| CFA | Cease Fire Agreement |
| CFS | cubic feet per second |
| CHINCOM | China Committee of the Paris Consultative Committee |
| CIA | Central Intelligence Agency (US) |
| CINADCUS | Commander-in-Chief, Air Defence, Canada-United States |
| CINCONAD | Commander-in-Chief, Continental Air Defence Command |
| CIR | Canada-India Reactor |
| CISC | Commission internationale de surveillance et de contrôle |
| CJS | Canadian Joint Staff |
| CM | Common Market |
| COCOM | Coordinating Committee on Export Controls |
| COTC | Canadian Overseas Telecommunications Corporation |
| CP | Canadian Press |
| CP | Contracting Party (GATT) |
| CPDUN | Canadian Permanent Delegation to United Nations |
| CPSU | Communist Party of the Soviet Union |
| CRO | Commonwealth Relations Office (UK) |
| CT | cent |
| DCI | Department of Citizenship and Immigration |
| DEA | Department of External Affairs |
| DEM | Democrat |
| DEW | Distant Early Warning |
| DL | Defence Liaison Division |
| DND | Department of National Defence |
| DOT | Department of Transport |
| DRB | Defence Research Board |
| DRVN | Democratic Republic of Vietnam |
| EAO | External Affairs Officer |
| EDC | European Defence Community |
| EPI | Electronic Position Indicator |
| EPU | European Payments Union |
| EURATOM | European Atomic Energy Community |
| EX-IM | Export-Import |
| FAO | Food and Agriculture Organization |
| FBI | Federal Bureau of Investigation (US) |
| FBIS | Foreign Broadcast Information Service (US) |
| FDP | Freisinnig-Demokratische Partei [Free Democratic Party] (West Germany) |
| FEC | French Expeditionary Corps |
| FLM | French Liaison Mission |
| FMI | Fonds Monétaire International |
| FO | Foreign Office (UK) |
| FPC | Federal Power Commission (US) |
| FSO | Foreign Service Officer |
| FTA | Free Trade Area |
| FUPL | Fighting Units of the Pathet Lao |
| GATT | General Agreement on Tariffs and Trade |
| H-BOMB | Hydrogen Bomb |
| HEPCO | Hydro Electric Power Commission of Ontario |
| HR | House of Representatives (US) |
| IAC | Intelligence Advisory Committee (US) |
| IBRD | International Bank for Reconstruction and Development |
| ICBM | Intercontinental Ballistic Missile |
| ICEM | Intergovernmental Committee for European Migration |
| ICETP | Interdepartmental Committee on External Trade Policy |
| ICRC | International Committee of the Red Cross |
| ICSC | International Commission for Supervision and Control |
| IJC | International Joint Commission |
| ILO | International Labour Office |
| IMF | International Monetary Fund |
| INS | International News Service |
| IRO | International Refugee Organization |
| IWA | International Wheat Agreement |
| JIB | Joint Intelligence Bureau |
| JIC | Joint Intelligence Committee |
| KGB | Komitet Gosudarstvennoi Bezopasnosti (Committee of State Security -- USSR) |
| KLM | Royal Dutch Airlines |
| KPA/CPV | Korean People's Army/Chinese People's Volunteers |
| KW | kilowatt |
| LCM | Landing Craft, Mechanized |
| LCT | Landing Craft, Tanks |
| LNA | Laotian National Army |
| LORAC | Long Range Accuracy (radar) |
| LORAN | Long Range Aid to Naviation |
| MAA | Military Assistance Agreement (US) |
| MAAG | Military Assistance Advisory Group (US) |
| MAC | Military Armistice Commission |
| MAE | Ministère des Affaires extérieures |
| MDAP | Mutual Defence Assistance Program (US) |
| MFN | Most Favoured Nation |
| MGB | Ministerstvo Gosudarstvennoi Bezopasnosti [Ministry of State Security] (USSR) |
| M.P. | Member of Parliament |
| MT | Mobile Team |
| MTCA | Ministry of Transport and Civil Aviation (UK) |
| MVD | Ministerstvo Vnutrennykh Del [Ministry of Internal Affairs] (USSR) |
| NATO | North Atlantic Treaty Organization |
| NCO | Non-Commissioned Officer |
| NFB | National Film Board |
| NFPA | Niagara Frontier Port Authority |
| NNSC | Neutral Nations Supervisory Commission |
| NPD | Nuclear Power Demonstration |
| NSA | National Security Agency |
| NZ | New Zealand |
| ODM | Office of Defense Mobilization (US) |
| OECE | Organisation européenne de coopération économique |
| OEEC | Organization for European Economic Cooperation |
| OMC | Office of Munitions Control (US) |
| OTAN | Organisation du traité de l'Atlantique Nord |
| PASNY | Power Authority of the State of New York |
| PAVN | People's Army of Vietnam |
| P.C. | Progressive Conservative |
| PC(O) | Privy Council (Office) |
| PERMDEL | Permanent Delegation of Canada to the United Nations, New York |
| PJBD | Permanent Joint Board on Defence |
| PKO | Powszechna Kasa Oszczeednossci [National Savings Bank] (Poland) |
| PL | Pathet Lao |
| PL | Public Law (US) |
| PM | Prime Minister |
| PPR | Polska Partia Robotnicza [Polish Workers' Party] |
| QC | Queen's Counsel |
| QR | Quantitative Restrictions |
| RAF | Royal Air Force (UK) |
| RCAF | Royal Canadian Air Force |
| RCMP | Royal Canadian Mounted Police |
| RCN | Royal Canadian Navy |
| REP | Republican |
| RLG | Royal Laotian Government |
| ROK | Republic of Korea |
| RSFSR | Russian Soviet Federated Socialist Republic |
| S | Senate (US) |
| SAC | Strategic Air Command (US) |
| SACEUR | Supreme Allied Commander, Europe (NATO) |
| SACLANT | Supreme Allied Commander, Atlantic (NATO) |
| SAGE | Semi-Automatic Ground Environment |
| SAS | Scandinavian Airlines |
| SEATO | South East Asia Treaty Organization |
| SG | Standing Group (NATO) |
| SLSA | St. Lawrence Seaway Authority |
| SLSDC | St. Lawrence Seaway Development Corporation (US) |
| SMA | Senior Military Advisor |
| SOP | Standard Operating Procedures |
| SPD | Sozialdemokratische Partei Deutschlands [Social Democratic Party of Germany] (West Germany) |
| SUNFED | Special United Nations Fund for Economic Development |
| SVLM | South Vietnam Liaison Mission |
| SVN | South Vietnam |
| TCA | Trans-Canada Airlines |
| TERM | Temporary Equipment Recovery Mission |
| UK | United Kingdom |
| UKAEA | United Kingdom Atomic Energy Authority |
| UN | United Nations |
| UNC | United Nations Command |
| UNEF | United Nations Emergency Force |
| UNESCO | United Nations Educational, Scientific and Cultural Organization |
| UNHCR | United Nations High Commissioner for Refugees |
| UNRRA | United Nations Relief and Rehabilitation Administration |
| UP | Universal Press |
| USA | United States of America |
| USAF | United States Air Force |
| USIS | United States Information Service |
| USN | United States Navy |
| USS | United States Ship |
| USSEA | Under-Secretary of State for External Affairs |
| USSR | Union of Soviet Socialist Republics |
| WEU | Western European Union |