| Acronym | Definition |
|---|
| IRTF➣Internet Research Task Force |
| IRTF➣Infrared Telescope Facility (NASA) |
| IRTF➣NASA Infrared Telescope Facility (Mauna Kea, Hawaii) |
| IRTF➣Immediate Reaction Task Force |
| IRTF➣Individual Returns Transaction File |
| IRTF➣International Radio & Television Foundation, Inc. |