IRSN
| Acronym | Definition |
|---|---|
| IRSN | Institut de Radioprotection et de Sûreté Nucléaire (French: Institute for Radioprotection and Nuclear Safety) |
| IRSN | Information Retrieval in Sensor Networks |
| IRSN | International Road Safety News |
| IRSN | International Republican Socialist Network (political group) |
| IRSN | Internal Revenue Service Number (US IRS) |
| IRSN | International Relations Student Network |