| Abbreviation | Definition |
|---|---|
| IUPUI | Indiana University Purdue University Indianapolis |
| IUPUI | Indiana University – Purdue University Indianapolis |
| IUPUI | Indiana University Purdue University |
| IUPUI | Indiana University Purdue University Indianapolis |
| IUR | International University of Rabat |
| IUR | Irish University Review |
| IUR | Islamic University of Rotterdam |
| IUS | Indiana University Southeast |
| IUSA | Irish University Sailing Association |
| IUSE | International University of Southern Europe |
| IUSL | Indiana University Second Life |
| IUSM | Indiana University School of Medicine |
| IUSS | Innovation Universities Science and Skills |
| IUST | International University for Science and Technology |
| IUT | Improving University Teaching |
| IUT | Instituts Universitaires de Technologie |
| IUT | Isfahan University of Technology |
| IUTA | International University Theatre |
| IUTA | International University Theatre Association |
| IUU | IMS Unison University |