| Abr. | Nom | Ville | Etabl. |
|---|---|---|---|
| ACP | African, Caribbean, and Pacific Countries | Brussels | 01/04/1976 |
| AfDB | African Development Bank | Abidjan | 04/08/1963 |
| ACCT | Agency for Cultural and Technical Cooperation | Paris | 21/03/1970 |
| OPANAL | Agency for the Prohibition of Nuclear Weapons in Latin America and the Caribbean | Mexico City | 14/02/1967 |
| AG | Andean Group | Lima | 26/05/1969 |
| ABEDA | Arab Bank for Economic Development in Africa | Khartoum | 18/02/1974 |
| ACC | Arab Cooperation Council | 16/02/1989 | |
| AFESD | Arab Fund for Economic and Social Development | 16/05/1968 | |
| AL | Arab League | Cairo | 22/03/1945 |
| AMU | Arab Maghreb Union | Rabat | 17/02/1989 |
| AMF | Arab Monetary Fund | Abu Dhabi | 27/04/1976 |
| APEC | Asia Pacific Economic Cooperation | Singapore | 07/11/1989 |
| AsDB | Asian Development Bank | Manila | 19/12/1966 |
| ASEAN | Association of Southeast Asian Nations | Jakarta | 09/08/1967 |
| Mekong Group | ASEAN-Mekong Basin Development Group | 01/12/1995 | |
| ANZUS | Australia-New Zealand-United States Security Treaty | Canberra | 01/09/1951 |
| BIS | Bank for International Settlements | Basel | 20/01/1930 |
| Benelux | Benelux Economic Union | Brussels | 03/02/1958 |
| BSEC | Black Sea Economic Cooperation Zone | 25/06/1992 | |
| Caricom | Caribbean Community and Common Market | Georgetown | 04/07/1973 |
| CDB | Caribbean Development Bank | 18/10/1969 | |
| UDEAC | Central African Customs and Economic Union | Bangui | 08/12/1964 |
| BDEAC | Central African States Development Bank | Brazzaville | 03/12/1975 |
| BCIE | Central American Bank for Economic Integration | Tegucigalpa | 13/12/1960 |
| CACM | Central American Common Market | Guatemala City | 13/12/1960 |
| CEI | Central European Initiative | Budapest | 27/07/1991 |
| CP | Colombo Plan | Colombo | 01/07/1951 |
| C | Commonwealth | London | 31/12/1931 |
| CIS | Commonwealth of Independent States | Minsk | 08/12/1991 |
| CAEU | Council of Arab Economic Unity | Amman | 03/06/1957 |
| CE | Council of Europe | Strasbourg | 05/05/1949 |
| CBSS | Council of the Baltic Sea States | 05/03/1992 | |
| Entente | Council of the Entente | Abidjan | 29/05/1959 |
| CCC | Customs Cooperation Council | Brussels | 15/12/1950 |
| EADB | East African Development Bank | Kampala | 06/06/1967 |
| ESCAP | Economic and Social Commission for Asia and the Pacific | Bangkok | 28/03/1947 |
| ESCWA | Economic and Social Commission for Western Asia | Amman | 09/08/1973 |
| ECA | Economic Commission for Africa | Addis Ababa | 29/04/1958 |
| ECE | Economic Commission for Europe | Geneva | 28/03/1947 |
| ECLAC | Economic Commission for Latin America and the Caribbean | Santiago | 25/02/1948 |
| CEEAC | Economic Community of Central African States | Libreville | 18/10/1983 |
| CEPGL | Economic Community of the Great Lakes Countries | 26/09/1976 | |
| ECOWAS | Economic Community of West African States | Lagos | 28/05/1975 |
| ECO | Economic Cooperation Organization | Tehran | 01/01/1985 |
| EBRD | European Bank for Reconstruction and Development | London | 15/04/1991 |
| EFTA | European Free Trade Association | Geneva | 04/01/1960 |
| EIB | European Investment Bank | Luxembourg | 25/03/1957 |
| CERN | European Organization for Nuclear Research | Geneva | 01/07/1953 |
| ESA | European Space Agency | Paris | 31/07/1973 |
| EU | European Union | Brussels | 07/02/1992 |
| FAO | Food and Agriculture Organization | Rome | 16/10/1945 |
| FZ | Franc Zone | Paris | 20/12/1945 |
| G-2 | Group of 2 | ||
| G-3 | Group of 3 | 01/10/1990 | |
| G-5 | Group of 5 | 22/09/1985 | |
| G-6 | Group of 6 | 22/05/1984 | |
| G-7 | Group of 7 | 22/09/1985 | |
| G-8 | Group of 8 | 01/10/1975 | |
| G-9 | Group of 9 | ||
| G-10 | Group of 10 | Paris | 01/10/1962 |
| G-11 | Group of 11 | 22/06/1984 | |
| G-15 | Group of 15 | Geneva | |
| G-19 | Group of 19 | 01/10/1975 | |
| G-24 | Group of 24 | Brussels | 01/01/1972 |
| G-77 | Group of 77 | 01/10/1967 | |
| GCC | Gulf Cooperation Council | Riyadh | 25/05/1981 |
| IADB | Inter-American Development Bank | Washington | 08/04/1959 |
| IGADD | Inter-Governmental Authority on Drought and Development | Djibouti | 15/01/1986 |
| IAEA | International Atomic Energy Agency | Vienna | 26/10/1956 |
| IBRD | International Bank for Reconstruction and Development | Washington | 22/07/1944 |
| ICC | International Chamber of Commerce | Paris | 01/01/1919 |
| ICAO | International Civil Aviation Organization | Montreal | 07/12/1944 |
| ICFTU | International Confederation of Free Trade Unions | Brussels | 01/12/1949 |
| Interpol | International Criminal Police Organization | Lyon | 13/06/1956 |
| IDA | International Development Association | Washington | 26/01/1960 |
| IEA | International Energy Agency | Paris | 15/11/1974 |
| IFRCS | International Federation of Red Cross and Red Crescent Societies | Geneva | 05/05/1919 |
| IFC | International Finance Corporation | Washington | 25/05/1955 |
| IFAD | International Fund for Agricultural Development | Rome | 01/11/1974 |
| ILO | International Labor Organization | Geneva | 11/04/1919 |
| IMO | International Maritime Organization | London | 17/03/1958 |
| Inmarsat | International Mobile Satellite Organization | London | 03/09/1976 |
| IMF | International Monetary Fund | Washington | 22/07/1944 |
| IOC | International Olympic Committee | Lausanne | 23/06/1894 |
| IOM | International Organization for Migration | Geneva | 05/12/1951 |
| ISO | International Organization for Standardization | Geneva | 01/02/1947 |
| ICRM | International Red Cross and Red Crescent Movement | Geneva | 01/01/1928 |
| ITU | International Telecommunication Union | Geneva | 09/12/1932 |
| Intelsat | International Telecommunications Satellite Organization | Washington | 20/08/1971 |
| IDB | Islamic Development Bank | Jeddah | 15/12/1973 |
| LAES | Latin American Economic System | Caracas | 17/10/1975 |
| LAIA | Latin American Integration Association | Montevideo | 12/08/1980 |
| MTCR | Missile Technology Control Regime | 16/04/1987 | |
| NAM | Nonaligned Movement | Jakarta | 01/09/1961 |
| NC | Nordic Council | Stockholm | 16/03/1952 |
| NIB | Nordic Investment Bank | Helsinki | 04/12/1975 |
| ANC | North Atlantic Cooperation Council | Brussels | 08/11/1991 |
| NATO | North Atlantic Treaty Organization | Brussels | 17/09/1949 |
| EN | Nuclear Energy Agency | 01/01/1958 | |
| NSG | Nuclear Suppliers Group | Vienna | |
| OECD | Organization for Economic Cooperation and Development | Paris | 14/12/1960 |
| OSCE | Organization for Security and Cooperation in Europe | Vienna | 01/01/1995 |
| OAU | Organization of African Unity | Addis Ababa | 25/05/1963 |
| OAS | Organization of American States | Washington | 30/04/1948 |
| OAPEC | Organization of Arab Petroleum Exporting Countries | 09/01/1968 | |
| OECS | Organization of Eastern Caribbean States | Castries | 18/06/1981 |
| OPEC | Organization of Petroleum Exporting Countries | Vienna | 14/09/1960 |
| OIC | Organization of the Islamic Conference | Jeddah | 22/09/1969 |
| PFP | Partnership for Peace | 10/01/1994 | |
| PCA | Permanent Court of Arbitration | 29/07/1899 | |
| RG | Rio Group | 01/01/1988 | |
| SAARC | South Asian Association for Regional Cooperation | Kathmandu | 08/12/1985 |
| SPC | South Pacific Commission | Noumea | 06/02/1947 |
| SPF | South Pacific Forum | Suva | 05/08/1971 |
| Sparteca | South Pacific Regional Trade and Economic Cooperation Agreement | 01/01/1981 | |
| SACU | Southern African Customs Union | Pretoria | 11/12/1969 |
| SADC | Southern African Development Community | Gaborone | 17/08/1992 |
| Mercosur | Southern Cone Common Market | Buenos Aires | 26/03/1991 |
| UN | United Nations | New York | 26/06/1945 |
| UNAVEM III | United Nations Angola Verification Mission | New York | 20/12/1988 |
| UNAMIR | United Nations Assistance Mission for Rwanda | New York | 05/10/1993 |
| UNCTAD | United Nations Conference on Trade and Development | Geneva | 30/12/1964 |
| UNCRO | United Nations Confidence Restoration Operation in Croatia | New York | 31/03/1995 |
| UNDOF | United Nations Disengagement Observer Force | Damascus | 31/05/1974 |
| UNESCO | United Nations Educational, Scientific, and Cultural Organization | Paris | 16/11/1945 |
| UNFICYP | United Nations Force in Cyprus | New York | 04/03/1964 |
| UNIDO | United Nations Industrial Development Organization | Vienna | 17/11/1966 |
| UNITAR | United Nations Institute for Training and Research | 11/12/1963 | |
| UNIFIL | United Nations Interim Force in Lebanon | New York | 19/03/1978 |
| UNIKOM | United Nations Iraq-Kuwait Observation Mission | New York | 09/04/1991 |
| UNMOGIP | United Nations Military Observer Group in India and Pakistan | New York | 13/08/1948 |
| MINURSO | United Nations Mission for the Referendum in Western Sahara | New York | 29/04/1991 |
| UNMIH | United Nations Mission in Haiti | New York | 23/09/1993 |
| UNMOT | United Nations Mission of Observers in Tajikistan | New York | 16/12/1994 |
| UNOMIG | United Nations Observer Mission in Georgia | New York | |
| UNOMIL | United Nations Observer Mission in Liberia | New York | 22/09/1993 |
| UNHCR | United Nations Office of the High Commissioner for Refugees | Geneva | 03/12/1949 |
| UNPREDEP | United Nations Preventive Deployment Force | 31/03/1995 | |
| UNPROFOR | United Nations Protection Force | New York | 28/02/1992 |
| UNRWA | United Nations Relief and Works Agency for Palestine Refugees in the Near East | Vienna | 08/12/1949 |
| UNTSO | United Nations Truce Supervision Organization | Jerusalem | 01/05/1948 |
| UNU | United Nations University | 06/12/1973 | |
| UPU | Universal Postal Union | Bern | 09/10/1874 |
| WADB | West African Development Bank | Lome | 14/11/1973 |
| WEU | Western European Union | Brussels | 23/10/1954 |
| WCL | World Confederation of Labor | Brussels | 19/06/1920 |
| WFTU | World Federation of Trade Unions | Prague | 03/10/1945 |
| WHO | World Health Organization | Geneva | 22/07/1946 |
| WIPO | World Intellectual Property Organization | Geneva | 14/07/1967 |
| WMO | World Meteorological Organization | Geneva | 11/10/1947 |
| WToO | World Tourism Organization | Madrid | 02/01/1975 |
| WTrO | World Trade Organization | 15/04/1994 | |
| ZC | Zangger Committee |