IAA
IAA stands for:
- Intercultural Achievement Award , Austria
- International Motor Show , a trade fair in Munich, previously in Frankfurt am Main and Hanover, originally in Berlin
- International Workers' Association , also known as "First International"
- International Workers' Association , a federation of anarcho-syndicalist trade unions
- International Actuarial Association , the international umbrella organization of national actuarial organizations
- International Advertising Association
- International Academy of Architecture
- International Academy of Astronautics
- Igarka Airport , a Russian airport according to the IATA code
- Instituto de Astrofísica de Andalucía , an astronomical institute in Spain
- Indole-3-acetic acid , see Indole-3-acetic acid
- International Alpaca Association
- Industrial settling plant , see settling basin (mining)
- Indian Association of Alberta
- International Labor Office , an organ of the International Labor Organization
- Internet export declaration , see export declaration
- Intel Application Accelerator , a software
- Irish Aviation Authority , the Irish air traffic control
- Israel Airports Authority
- Israel Antiquities Authority
