| Acronym | Definition |
|---|
| IRSS | Infrared Supression System |
| IRSS | Indiana Registry of Soil Scientists (West Lafayette, IN) |
| IRSS | Information & Resource Support System |
| IRSS | Infrared Search System |
| IRSS | Investor Responsibility Support Services (Media, PA) |
| IRSS | International Relations and Security Studies (various universities) |
| IRSS | Integrated Requirements Supply System |
| IRSS | Instant Recall Storage System |
| IRSS | Integrated Reliability Software Suite |
| IRSS | Infrared Signature Suppression System |
| IRSS | Ingersoll-Rand Security and Safety |
| IRSS | Indian Railways Stores Service |
| IRSS | Instrumentation and Range Safety System (US Air Force) |
| IRSS | International Russian-Speaking Squad |
| IRSS | Integrated Range Status System |