| Acronym | Definition |
|---|
| IRT➣International Relations and Trade |
| IRT➣Item Response Theory |
| IRT➣In Real Time (various organizations) |
| IRT➣In Regard To |
| IRT➣Infrared Thermometer |
| IRT➣Iris Recognition Technology (biometrics) |
| IRT➣Intensive Residential Treatment |
| IRT➣Innovative Readiness Training (civil military program) |
| IRT➣Isochronous Real Time |
| IRT➣Institute of Road Transport (India) |
| IRT➣Imago Relationship Therapist |
| IRT➣In Reference To |
| IRT➣Industriepark Region Trier (German: Trier Region Industrial Park) |
| IRT➣Institute for Responsible Technology (Fairfield, IA) |
| IRT➣Imagery Rehearsal Therapy (psychology) |
| IRT➣Icing Research Tunnel (wind tunnel) |
| IRT➣Interborough Rapid Transit (New York City subway division) |
| IRT➣Interborough Rapid Transit |
| IRT➣Integrated Receiver Transcoder |
| IRT➣Infra Red Technology |
| IRT➣Information Resources and Technology |
| IRT➣Incident Response Team |
| IRT➣In Regards To |
| IRT➣Indiana Repertory Theatre |
| IRT➣Immunoreactive Trypsinogen |
| IRT➣Institute for Recruitment of Teachers |
| IRT➣Ice Road Truckers (TV show) |
| IRT➣Industry Round Table (various organizations) |
| IRT➣International Racquetball Tour |
| IRT➣Independent Review Team |
| IRT➣Injury Recall Technique (applied kinesiology) |
| IRT➣International Rescue Team (various locations) |
| IRT➣International Registered Traveler |
| IRT➣Infrared Telescope |
| IRT➣Initial Response Team |
| IRT➣Immediate Response Team |
| IRT➣Infrared Transmitting (film) |
| IRT➣Interactive Ray Tracing |
| IRT➣Integrated Receiver/Transcoder |
| IRT➣Inner Resonance Technologies |
| IRT➣Individual Readiness Training |
| IRT➣Integrated Retail Terminal |
| IRT➣Initiative Riviera Technologies (France) |
| IRT➣Integrated Requirements Team |
| IRT➣Integrated Response Technology (clinical trials) |
| IRT➣Instructional Resource Teacher |
| IRT➣Income Reporting Threshold (taxation) |
| IRT➣Internal Radiation Therapy |
| IRT➣Instrument Rating Test |
| IRT➣Integrated Remote Technology (Subsea 7) |
| IRT➣Institute for Rapid Transit |
| IRT➣Infinity/Radiance/Trance (gaming, Breath of Fire III) |
| IRT➣Incidence Reporting Team |
| IRT➣Interim Remote Terminal |
| IRT➣Integrated Rendezvous Radar Target (NASA) |
| IRT➣Intermediate Range Technology |
| IRT➣Initial Reconditioning Test |
| IRT➣In-Reactor Thimble (Fast Test Reactor) |
| IRT➣Initial Reconnaissance Team |
| IRT➣Intervention Response Team |
| IRT➣Installation Readiness Testing |
| IRT➣Industria de Radio y Televisión (Chilean Electronics) |
| IRT➣In Response/Reply/Reference To |
| IRT➣Investigation and Recovery Team |
| IRT➣Integrated Reliability Test |
| IRT➣Integrated Rail Terminal |