International Aviation Management Training Institute

Institute of Cadre Management Suzhou

Stockholm International Peace Research Institute (SIPRI) (швед. Stockholms internationella fredsforskningsinstitut)

International Institute for Strategic Studies (IISS)

international humanitarian law (See international law of armed conflict)

International legion for the Defence of Ukraine (ILDU) / International Legion of Territorial Defence of Ukraine / Ukrainian Foreign Legion

International Military Sports Council (IMSC) / Conseil International du Sport Militaire (CISM)    

Institute for the Study of War (ISW)

military institute

Royal United Services Institute for defense and Security Studies (RUSI)

United States Naval Institute (USNI)

U.S. Naval Institute

institute an award

European Telecommunications Standards Institute (ETSI)

International Civil Aviation Organization (ICAO)

working group on meteorological services to be provided to international general aviation

International Agricultural Aviation Center

International aviation data registry

international aviation emission(s)

International Aviation Safety Assessment Programme

International Aviation Weather Service Programme

International Business Aviation Council

International Court of Aviation and Space Arbitration

International Data Exchange for Aviation Safety Group

international general aviation

digital training management system (DTMS)

training management

training management wargame

Civil Aviation Training Center

live-fire training (field-fire training)

Air defense and Airspace Management Directorate (NATO)

air traffic flow management (ATFM)

air traffic management (ATM)