| Abbreviation | Definition |
|---|---|
| IAT | Institute of Advanced Technology |
| IAT | Instructor Authorization Test |
| IATT | Institute for Advanced Theatre Training |
| IAU | Independent Air University |
| IAU | Institute for American Universities |
| IAU | International American University |
| IAU | International Association of Universities |
| IAU | Islamic Azad University |
| IAUA | Indian Agricultural Universities Association |
| IAUC | International Advance University Credit |
| IAUC | International Advanced University Credit |
| IAUE | Ignatius Ajuru University of Education |
| IAUP | International Association of University Presidents |
| IAW | Interdisciplinary Archaeology Workshop (The University of Chicago) |
| IAWU | Irish Archaeological Wetland Unit |
| IBA | Institute of Business Administration |
| IBAB | Institute of Bioinformatics and Applied Biotechnology |
| IBAT | Institute of Business Administration and Technology, Northern University Bangladesh |
| IBAT | Institute of Business Administration Training, Bhubaneswar, Orissa, India |
| IBBME | Institute of Biomaterials and Bio-Medical Engineering (University of Toronto) |