| Abbreviation | Definition |
|---|---|
| RAC | Radio Amateurs Of Canada |
| RACES | Radio Amateur Civil Emergency Service |
| RACES | Radio Amateur Civil Emergency Services |
| RAG | Repeater Amateur Group |
| RAIBC | Radio Amateur Invalid and Blind Club (UK) |
| RAL | Robert A. Leskovec, K8DTS |
| RAM | Random Access Memory |
| RAMB | Roof Antenna Mounting Bracket |
| RANV | Radio Amateurs of Northern Vermont |
| RAOLP | Radio Amateur Operators Legal Procedures |
| RARA | Rockford Amateur Radio Association |
| RAT | Radio Access Technology |
| RBF | Running Barefoot |
| RBS | Radio Base Station |
| RC | Radio Caller |
| RC | Resistor-Capacitor |
| RCA | Radio Corporation of America |
| RCC | Radio Common Carrier |
| RCC | Rag Chewers Club |
| RCD | Receiver Carrier Detector |