| Abbreviation | Definition |
|---|---|
| IIPT | Irish Institute of Physical Therapy |
| IIRA | Illinois Institute for Rural Affairs |
| IIRA | Indigital Institute of Recording Arts |
| IIRC | Islamic Institute Of Religion And Culture |
| IIRE | India Institute of Real Estate |
| IIRE | Indus Institute for Research and Education |
| IIRE | ISF Institute of Research and Education |
| IIRE | ISF Institution of Research and Education |
| IIRF | International Institute for Religious Freedom |
| IIRM | Indian Institute Of Research And Management |
| IIRM | Institute Of Insurance and Risk Management |
| IIRM | International Institute for Race Medicine |
| IIRM | International Institute for Running Medicine |
| IIRM | International Institute of Race Medicine |
| IIRP | Institute for Intersectionality Research and Policy |
| IIRP | International Institute For Restorative Practices |
| IIRS | Indian Institute of Remote Sciences |
| IIRS | Indian Institute of Remote Sensing |
| IIRS | Institute for Industrial Research and Standards |
| IIS | Institute for Intelligent Systems |