English abbreviations from iasip to ib
- IASIP (It's Always Sunny in Philadelphia)
- IASIS (International Association for Student Insurance Services)
- IASIW (Institute for the Advanced Study of Information Warfare)
- IASM (Informative All Student Meetings)
- IASO (International Association for the Study of Obesity)
- IASP (International Association for the Study of Pain)
- IASY ((observing program) International Active Sun Year, the name given to a series of coordinated Sun-related observational programs performed in 1969 and 1971)
- IAT (Internal Active Turret)
- IATA (International Air Transport Association)
- IATACS (Improved Army Tactical Area Communications System)
- IATF (International Automotive Task Force)
- IATI (Infant Adoption Training Initiative)
- IATO (Interim Authority to Operate)
- IATSE (International Alliance of Theatrical Stage Employees)
- IATT (Institute for Advanced Theatre Training)
- IAU (International Association of Universities||International Astronomical Union)
- IAUA (Indian American Urological Association)
- IAUC (International Astronomical Union Circular)
- IAUP (International Association of Underwater Polo)
- IAVA (Information Assurance Vulnerability Alert)
- IAVM (Information Assurance Vulnerability Management)
- IAVMS (Installation Automated Vehicle Management System)
- IAW (In Accordance With)
- IAWT (Industrial Aerodynamics Wind Tunnel)
- IAYC ((meeting) International Astronomical Youth Camp)
- IB (International Baccalaureate)
