| Abbreviation | Definition |
|---|---|
| RG | Radial Ground |
| RG | Radio Government |
| RGL | Ramalho G.711 Lossless |
| RH | Right Handed polarization |
| RHCP | Right Hand Circular Polarization |
| rig | Amateur radio equipment in licensee's radio room: |
| RIG | Radio Station Equipment |
| RIV | Radio Interference Voltage |
| RLC | Repeater Link Controller |
| RLLA | Resistively Loaded Linear Antenna |
| RMC | Repeater Management Committee |
| RMCA | Rocky Mountain Communication Association |
| RMG | Roadrunners Microwave Group |
| RMS | Rate My Signal |
| RNC | Regional Net Control |
| RNTI | Radio Network Temporary Identifier |
| ROA | Radio Operators Authorization |
| ROARS | Ramona Outback Amateur Radio Society |
| ROC | Receiver Operating Characteristic |
| ROFL | Really Old Farts Linger |