IADB (Inter-American Development Bank - Washington)
IAEA (International Atomic Energy Agency - Vienna)
IARC (International Agency for Research on Cancer, Lyon - France)
IIASA (International Institute for Applied Systems Analysis - Laxenburg, Austria)
IATA (International Air Transport Association - Montreal, Geneva, London)
ICANN (Internet Corporation for Assigned Names and Numbers, Marina del Rey, CA, USA) I
ICAO (International Civil Aviation Organization, Montreal)
ICARDA (International Center for Agricultural Research in the Dry Areas - Aleppo, Syria)
ICC (International Computing Center, Geneva)
ICC (International Criminal Court, The Hague)
ICG (International Crisis Group -Brussels)
ICGEB (International Center for Genetic Engineering and Biotechnology, Trieste and New Delhi)
ICJ (International Court of Justice - The Hague, Netherlands)
ICLARM (International Center for Living Aquatic Resources Management - Penang, Malaysia)
ICRC (International Committee of the Red Cross, Geneva)
ICRISAT (International Crops Research Institute for the Semi-Arid Tropics - Patancheru, India).
ICSC (International Civil Service Commission - for the United Nations System)
ICTP (International Center for Theoretical Physics, Trieste)
ICTR (International Criminal Tribunal for Rwanda, Arusha, Tanzania)
ICTY (International Criminal Tribunal for the former Yugoslavia, The Hague)
IDEA (International Institute for Democracy and Electoral Assistance, Stockholm)
IFAD (International Fund for Agricultural Development - Rome)
IFC (International Finance Corporation - Washington)
IFDC (International Fertilizer Development Center - Muscle Shoals, Alabama, USA)
IFPRI (International Food Policy Research Institute - Washington, D.C. , USA)
IFRC (International Federation of Red Cross and Red Crescent Societies, Geneva)
IIED (International Institute for Environment and Development - London)
IISD (International Institute for Sustainable Development - Winnipeg, Manitoba, Canada)
IITA (International Institute of Tropical Agriculture - Ibadan, Nigeria)
ILO (International Labour Organization - Geneva)
ILRI (International Livestock Research Institute - Nairobi, Kenya and Addis Ababa, Ethiopia)
IMF (International Monetary Fund - Washington)
IMO (International Maritime Organization - London)
INMARSAT (International Maritime Satellite Organization - London)
INSTRAW (United Nations International Research and Training Institute for the Advancement of Women - Santo Domingo, Dominican Republic)
INTELSAT (International Telecommunications Satellite Organizations - Washington)
INTERPOL (International Police Organization - Paris)
IOM (International Organization for Migration - Geneva)
IPU (Inter-Parliamentary Union- Geneva)
IRRI (International Rice Research Institute - Los Banos, Philippines)
ISA (International Seabed Authority - Kingston, Jamaica)
ISDB (Islamic Development Bank - Jeddah, Saudi Arabia)
ISNAR (International Service for National Agricultural Research - The Hague, The Netherlands)
ITC (International Trade Center - Geneva)
ITCILO (International Training Center of the International Labour Organization -Turin, Italy)
ITLOS (International Tribunal for the Law of the Sea - Hamburg, Germany)
ITTO (International Tropical Timber Organization - Yokohama, Japan)
ITU (International Telecommunications Union - Geneva)
IUCN (The World Conservation Union - Gland, Vaud, Switzerland)
IWMI (International Water Management Institute - Colombo, Sri Lanka)
JRC (European Joint Research Institute -Brussels)
