TIRS
| Acronym | Definition |
|---|---|
| TIRS | The Integrated Reasoning Shell (IBM) |
| TIRS | Transport Infrastructure Regional Study (Europe) |
| TIRS | Tactical Interrogation Report |
| TIRS | Thermal Infrared Scanner |
| TIRS | Temple Israel Religious School (various locations) |
| TIRS | TL1 Interface Router Service (Nortel) |
| TIRS | Tactical Information Retrieval System |
| TIRS | Telephone Investigator's Research System |