RIRS
| Acronym | Definition |
|---|---|
| RIRS | Rhode Island Rose Society |
| RIRS | Regulatory Information Retrieval System (National Association of Insurance Commissioners) |
| RIRS | Retrograde Intrarenal Stone Surgery (treatment of kidney stones) |
| RIRS | Railroad Inspection Reporting System |
| RIRS | Random Insertion of Redundant Symbols |