| Abbreviation | Definition |
|---|---|
| RSC | Reading Skate Crew |
| RSI | RoadSide Interview |
| RSIP | Royal Solomon Islands Police |
| RSO | Registered Sex Offender |
| RSO | Road Safety Officer |
| RST | Ramsey Spin Team |
| RSVP | Respondent Shall Verify Presence |
| RTC | Road Traffic Collision |
| RTCIPF | Royal Turks and Caicos Islands Police Force |
| RTCIPF | Royal Turks Caicos Islands Police Force |
| RTCPF | Royal Turks and Caicos Police Force |
| RTID | Real Time IDentification |
| RTO | Radio Traffic Only |
| RTOR | Right Turn On Red |
| RTPD | Redford Township Police Department |
| RTPH | Royal Thai Police Headquarters |
| RTPS | Regional Transit Police Services |
| RU | Response Unit |
| RU | Responsibility Unit |
| RUC | Royal Ulster Constabulary (1922-06-01 to 2001-11-04) (see PSNI) |