| Abbreviation | Definition |
|---|---|
| IRRT | Intel Rapid Recover Technology |
| IRST | Intel Rapid Storage Technology |
| IRT | Immediate Ranging Technology |
| IRT | Inertia Racing Technology |
| IRT | Infared Retaining Technology |
| IRT | Information Resources and Technology |
| IRT | Institute for Responsible Technology |
| IRTC | Instructional Resource Technology Center |
| IRTC | Integrated Rural Technology Centre |
| IRTC | Intuitive Research and Technology Corporation |
| IRTI | Innovative Rehabilitation Technology Inc |
| IRTT | Institute for Research and Technology Transfer |
| IRTT | Institute of Road and Transport Technology |
| IRTU | Industrial Research and Technology Unit |
| IRTW | International Rope Technology Workshops |
| ISAR | Inverse Synthetic Aperture Radar |
| ISAT | Inflatable Sound Attenuation Technology |
| ISAT | Inginternational Science And Technology |
| ISAT | Integrated Science and Technology |
| ISAT | International Science And Technology |