| Abbreviation | Definition |
|---|---|
| RSM | Regional Sales Manager |
| RSO | Retirement Services Officer |
| RSO | Round, Square, and Oval |
| RSR | Rehabilitation Service Representative |
| RSR | Researcher |
| RST | Registered Seed Technologist |
| RSW | Registered Social Worker |
| RT | Registered Technologist |
| RT | Reliable Totally |
| RT | Residential Technician |
| RT | Respiratory Therapist |
| RT | Road Technician |
| RT2/c | Radio Technician Second class |
| RTA | Referring Travel Agent |
| RTA | Resident Technical Assistant |
| RTA | Resident Twinning Advisor |
| RTC | Rail Traffic Controller |
| RTC | Real Time Captionist |
| RTE | Renault Technical Expert |
| RTP | Retention Tenure Promotion |