IAEA
International Atomic Energy Agency
IANA
Internet Assigned Numbers Authority
IBRD
International Bank for Reconstruction and Development (World Bank)
ICAO
International Civil Aviation Organization
ICC
International Chamber of Commerce
ICCt
International Criminal Court
ICJ
International Court of Justice (World Court)
ICRC
International Committee of the Red Cross
ICRM
International Red Cross and Red Crescent Movement
ICSID
International Center for Secretariat of Investment Disputes