| Acronym | Definition |
|---|
| IRSM➣Irish Republican Socialist Movement |
| IRSM➣Institute of Rock Structure and Mechanics (Academy of Sciences of the Czech Republic) |
| IRSM➣Inline Real-Time Stream Monitoring |
| IRSM➣Institute for Reconstructive Sciences in Medicine (Edmonton, AB, Canada) |
| IRSM➣Iraq Reconstruction Service Medal (UK) |
| IRSM➣International Revolutionary Solidarity Movement (anarchist group) |
| IRSM➣Interface Requirements Specification Manual |
| IRSM➣International Risk and Security Management Pty Ltd |