| Abbreviation | Definition |
|---|---|
| IRGP | Infrared Guided Projectile |
| IRGP | nfrared Guided Projectile |
| IRHVTA | Infrared High Value Target Acquisition |
| IRHVTA | nfrared High Value Target Acquisition |
| IRIA | Infrared Information and Analysis Center |
| IRIA | nfrared Information and Analysis Center |
| IRIAF | Islamic Republic of Iran Air Force |
| IRIAM | Integrated Radar and Infra-red Analysis and Modeling |
| IRIG | Inter Range Instrumentation Group |
| IRINT | Infrared Intelligence |
| IRIS | Information Regarding Israel Security |
| IRIS | Integrated Repair Information System |
| IRIS | Intelligent Recruiting Information System |
| IRISA | Intelligence Report Index Summary File |
| IRJH | Infrared Jammer Head |
| IRM | Information Resource Manager |
| IRM | Integrated Risk Management |
| IRM | Interim Restorative Material |
| IRMO | Information Resources Management Office |
| IRMS | Information Resource Management Services |