Organizations
- Interstate Athletic Conference, an all-boys high school sports league, is made of six private high schools in the Washington, DC area
- Interstate Aviation Committee
- International Astronautical Congress
- IAC (company) (InterActiveCorp), an American conglomerate
- Inter-African Committee on Traditional Practices Affecting the Health of Women and Children which raises consciousness about female genital cutting and similar issues
- International Action Center, a leftist organization
- International Aerobatic Club, which governs aerobatics in the United States under the regulation of the Fédération Aéronautique Internationale
- Internet Advertising Awards Competition, created in 1999 by Web Marketing Association to recognize excellence in internet advertising.
- Instituto de Astrofísica de Canarias, an astrophysical research institute based in the Canary Islands, Spain
- Irish Air Corps, the Aviation wing of the Irish Defense Forces
- Industrial Assessment Center, a U.S. Department of Energy program which trains engineering students and provides free energy efficiency assessments to small manufacturers
- InterAcademy Council
Read more about this topic: IAC