| Abbreviation | Definition |
|---|---|
| IRIS | Instruction Research and Information Services |
| IRIS | Internet Research Information Services |
| IRIU | Imam Reza International University |
| IRIU | Institutional Review of Irish Universities |
| IRK | Instructors Resource Kit |
| IRL | Imaging Research Laboratory |
| IRM | Institutional Records Management |
| IROP | International Research Opportunities Program |
| IRP | Intensive Research Project |
| IRRT | International Relations Round Table |
| IRS | Instructor Rating System |
| IRS | Intelligent Responsible Students |
| IRSHDC | Indian Residential School History & Dialogue Centre |
| IRTA | Intramural Research Training Award |
| IRTC | Instructional Resource and Technology Center |
| IRTU | Innovative Research Teams in Universities |
| IRU | Innovative Research Universities |
| IRUS | International Reformed University and Seminary |
| IS | Individuals Studying |
| IS | Information Science |