| Subject | English | Thesaurus |
| abbr., scottish | Airborne Relay Facility | ARF |
| abbr., scottish | Global Low Orbiting Message Relay satellite | GLOMR (USA) |
| mil., abbr. | IGRV Airborne Relay Facility | IGRV ARF |
| abbr. | Message Session Relay Protocol | Msrps (Artjaazz) |
| comp., net., abbr. | Transport Relay Translator | TRT |