| Abbreviation | Definition |
|---|---|
| IRRG | Infrastructure Resilience and Research Group |
| IRRG | Infrastructure Resilience Research Group |
| IRRI | Immigrant and Refugee Research Institute |
| IRRL | Interdisciplinary Robotics Research Laboratory |
| IRRP | Installation Restoration Research Program |
| IRRP | Interdisciplinarity and Relating Research with Practice |
| IRRS | Irish Radiation Research Society |
| IRS | Individualised Research Study |
| IRSA | Irish Research Staff Association |
| IRSB | Internal Research Support Booklet |
| IRSB | International Research Service Break |
| IRSE | Indigenous Research and STEM Education |
| IRSE | Instruction Research and Sectoral Engagement |
| IRSI | International Research Services Inc |
| IRSP | International Research and Studies Program |
| IRSP | International Research by Students Programme |
| IRSP | International Research Scholars Program |
| IRSP | Intramural Research Support Program |
| IRSS | Interdisciplinary Research Seminar Series |
| IRSS | Intramural Research Seminar Series |