IAG
IAG is an abbreviation for:
- E-ZPass Interagency Group (for example: E-ZPass service group), consists of 25 authorities or other bodies, spread over 14 US states, which provide all users with a standardized transponder, see E-ZPass
- Institute for Work and Health of the German Social Accident Insurance
- Insurance Australia Group , Australian insurance company
- Intelligent Application Gateway from Microsoft is an SSL VPN solution and further development of the Microsoft Internet Security and Acceleration Server (ISA)
- International Airlines Group , parent company of British Airways , Iberia , Vueling and Aer Lingus
- International Association of Geodesy , international organization of scientific geodesy and primarily responsible for the networking of its research activities and international services
- International Postcard Society (Berlin)
- International working group for group analysis
- International Association of Socialist Parties, see London office
- Niagara Falls International Airport in the United States by the IATA code