| Acronym | Definition |
|---|
| IRTS➣Institut Régional du Travail Social (France) |
| IRTS➣Infrared Telescope in Space (Japan) |
| IRTS➣International Radio and Television Society |
| IRTS➣Irish Radio Transmitters Society |
| IRTS➣Indian Railway Traffic Service |
| IRTS➣Increasing Returns to Scale |
| IRTS➣Intensive Residential Treatment Services |
| IRTS➣Infrared Target Simulator |
| IRTS➣Incident Reporting and Tracking System |
| IRTS➣Infrared Telescope on Spacelab (NASA) |
| IRTS➣Intensive Rehabilitation Treatment Services |