| IRT | I'll Remember That 
| Others |
| IRT | Ice Road Truckers
| Others |
| IRT | Icing Research Tunnel
| Others |
| IRT | Identification Referral Tracking
| Others |
| IRT | Identification, Referral, and Tracking
| Others |
| IRT | Immediate Ranging Technology
| Others |
| IRT | Immigration Removal Team
| Others |
| IRT | Immigration Review Tribunal
| Others |
| IRT | ImmunoReactive Trypsin
| Others |
| IRT | Impediment Removal Team
| Others |
| IRT | Implementation Review Team
| Others |
| IRT | In Real Time
| Others |
| IRT | In Record Time
| Others |
| IRT | In Regard To
| Others |
| IRT | In Regards To
| Others |
| IRT | Incident Response Team
| Others |
| IRT | Incident Response Technologies
| Others |
| IRT | Independence Realty Trust
| Others |
| IRT | Independent Review Team
| Others |
| IRT | Indexed Retention Time
| Others |
| IRT | Indian River Towers
| Others |
| IRT | Indiana Repertory Theatre
| Others |
| IRT | Individual Research Training
| Others |
| IRT | Individual Resiliency Training
| Others |
| IRT | Inertia Racing Technology
| Others |
| IRT | Infared Retaining Technology
| Others |
| IRT | Infinity Radiance Trance
| Others |
| IRT | Information Referral Tool
| Others |
| IRT | Information Resources and Technology
| Others |
| IRT | Infra Red Technology
| Others |
| IRT | Infra Red Transmissible
| Others |
| IRT | Infra Red Transmission
| Others |
| IRT | Infrared Radiation Thermography
| Others |
| IRT | Initial Response Team
| Others |
| IRT | Injector Response Time
| Others |
| IRT | Innovation Research and Training
| Others |
| IRT | Innovation Round Table
| Others |
| IRT | Innovative Readiness Training
| Others |
| IRT | Insanely Retarded Twats
| Others |
| IRT | Institute for Recruitment of Teachers
| Others |
| IRT | Institute for Responsible Technology
| Others |
| IRT | Integrated Receiver Transcoder
| Others |
| IRT | Integrated Recycling Technologies
| Others |
| IRT | Integrated Resource Technologies
| Others |
| IRT | Integrated Retail Terminal
| Others |
| IRT | Integrity Respect and Trust
| Others |
| IRT | Intensive Residential Treatment
| Others |
| IRT | Interactive Response Technologies
| Others |
| IRT | Interactive Response Technology
| Others |
| IRT | Interactive Restaurant Technology
| Others |
| IRT | Interboro Rapid Transit
| Others |
| IRT | Interborough Rapid Transi
| Others |
| IRT | Interborough Rapid Transit
| Others |
| IRT | Interborrough Rapid Transit
| Others |
| IRT | Intermediate Render Target
| Others |
| IRT | Intermediate Rider Training
| Others |
| IRT | Internal Remote Translator
| Others |
| IRT | International Racquetball Tour
| Others |
| IRT | International Recruiting Technology
| Others |
| IRT | International Relief Teams
| Others |
| IRT | International Road Transport
| Others |
| IRT | International Round Table
| Others |
| IRT | Internet Real Time
| Others |
| IRT | Internet Related Technologies
| Others |
| IRT | Internet Related Technology
| Others |
| IRT | Interpersonal Relations Training
| Others |
| IRT | Intrepid Rt
| Others |
| IRT | Investment Reporting Tool
| Others |
| IRT | IRC Remembers This
| Others |
| IRT | Isochronous Real Time
| Others |
| IRT | Item Response Theory
| Others |