| Abbreviation | Definition |
|---|---|
| RRT | Regional Response Team |
| RRU | Rapid Response Unit |
| RRU | Rehabilitation Review Unit |
| RRX | Russian Roulette, X number of rounds |
| RS | Referencing String |
| RS | Running Scared |
| RSA | Revised Statutes Annotated |
| RSA | Ritual Sexual Abuse |
| RSAT | Residential Substance Abuse Treatment |
| RSC | Revised Statutes of Canada |
| RSE | Remington Special Edition |
| RSL | Rail Safety Law |
| RSS | Revised Statutes of Saskatchewan |
| RSU | Restraint Strength Understanding |
| RSVP | Resolve to Stop the Violence Project |
| RSVP | Responsible Social Values Program |
| RSVP | Retired Senior Volunteer Patrol |
| RT | Response Time |
| RTD | right to die |
| RTG | Real Time Gangsters |