IRRS
| Acronym | Definition |
|---|---|
| IRRS | Integrated Regulatory Review Service (International Atomic Energy Agency) |
| IRRS | Irish Railway Record Society (est. 1946) |
| IRRS | Italian Radio Relay Service |
| IRRS | International Regulations Retrieval System (USDA) |
| IRRS | Institute of Radiation and Remote Sensing (University of California, Los Angeles) |
| IRRS | Individual Ready Reserve System |
| IRRS | International Rail Road System (British Columbia, Canada) |