| Abbreviation | Definition |
|---|---|
| QRW | Quasi-Random Word |
| QS | Quasi-Synchronous |
| QSK | Quadrature Shift Keying |
| QTAM | Queued Telecommunications Access Method |
| R | Ring |
| R10 | Receptor 10 |
| RACH | Random Access Channel |
| RAD | Recorded Announcement Device |
| RAEX | Roaming Agreement EXchange |
| RAI | Remote Alarm Indication |
| RALB | Resource All Busy |
| RANAP | Radio Access Network Application Part |
| RANN | Recorder ANNouncer |
| RAPID | Remote Access Protocol Interface Device |
| RAS | Remote Access Services |
| RAT | Radio Access Technologies |
| RAT | Referans Arabaglanti Teklifleri |
| RAT | Referans Araba lant1 Teklifleri |
| RATS | Radio Amateur Telecommunications Society |
| RATS | Richmond Amateur Telecommunications Society |