| Acronym | Definition |
|---|
| IASA | IETF Administrative Support Activity |
| IASA | International Association of Sound and Audiovisual Archives (also seen as IASAA) |
| IASA | International Association of Software Architects |
| IASA | Improving America's Schools Act of 1994 |
| IASA | International American Studies Association |
| IASA | International Aviation Safety Assessment |
| IASA | Idaho Association of School Administrators |
| IASA | International Alliance for Sustainable Agriculture (Minneapolis, MN) |
| IASA | Israel Arts and Science Academy (Jerusalem high school) |
| IASA | Insurance Accounting & Systems Association, Inc. |
| IASA | International Air Safety Association |
| IASA | Insurance Accounting & Statistical Association |
| IASA | Inter AS Anchor (3GPP) |
| IASA | Integrated AUTODIN System Architecture |
| IASA | Italian American Student Association (Ross University) |
| IASA | International Astronautic and Space Administration (Farscape) |
| IASA | Institute of Atomic Science in Agriculture (Netherlands) |
| IASA | Indirectly Acting Sympathomimetic Amines |