international air service

International Air Service Transit Agreement

scheduled international air service

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 Aviation Weather Service Programme

international earth rotation service

international telecommunication service

International Air Transport Association (IATA)

International Air and Space Fair

International Air Carrier Association

International Air Safety Association

International Air Transport Agreement

International Air Transport Association

international air transport regulation: present and future

International Federation of Air Line Pilots’ Associations

International Federation of Air Traffic Controllers’ Association

International Sanitary Convention for Air Navigation

aerial refueling / air refueling / in-flight refueling (IFR) / air-to-air refueling (AAR)

air combat capable helicopter / air-to-air capable helicopter

air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen

branch (military/service branch, armed service)

separate from active service / the service

Y service (Y-service) / Y-station

regional meteorological service/ regional weather service (RWS)

emergency service / emergency operations service

air traffic control service

air traffic service (ATS)

air weather service detachment

Special Air Service (SAS)

Queen's commendation for valuable service in the air

Special Air Service regiment operations-reconnaissance centre

United States Air Force Security Service