| Acronym | Definition |
|---|
| IRAT | Institut de Recherches Agronomiques Tropicales (Madagascar) |
| IRAT | Individual Readiness Assurance Test |
| IRAT | Imaging Response Assessment Team (drug response assessment) |
| IRAT | Inter-Radio Access Technology |
| IRAT | Integrated Resource Analysis Team (Support to US Department of Defense; Director, Operational Test and Evaluation) |
| IRAT | Incident Risk Analysis Toolkit |
| IRAT | Interim Remote Area Terminal |
| IRAT | Inter-SGSN Routing Area Table (GPRS services) |
| IRAT | Incident Response Analysis Team |
| IRAT | Independent Risk Assessment Team |
| IRAT | International Response Access Team (Virginia Beach, VA) |