| Abbreviation | Definition |
|---|---|
| IACUC | Institutional Animal Care and Use Committee |
| IACUC | Institutional Animal Care and Use Committees |
| IADT | Institute of Art, Design and Technology |
| IAES | Instituto de Análisis Económico y Social |
| IAFI | Ice Age Floods Institute |
| IALU | International Association of Lasallian Universities |
| IAO | Institute of Atmospheric Optics |
| IAOSE | International Academy of Occupational Safety Engineering |
| IAPSS | International Association for Political Science Students |
| IAR | Institute of Audio Research |
| IARC | International Agricultural Research Center |
| IARD | Institute of Agricultural Research for Development |
| IAS | Indian Administrative Studies |
| IAS | Institute for Advanced Study |
| IASE | Institute for Advanced Science & Engineering |
| IASH | Institute for Advanced Studies in the Humanities |
| IASH | Institute for the Advanced Studies of Health |
| IASIW | Institute for the Advanced Study of Information Warfare |
| IASM | Informative All Student Meetings |
| IAT | Implicit Association Test |