| Abbreviation | Definition |
|---|---|
| RSC | Resettlement Support Center |
| RSCD | Ramgati Student Community Dhaka |
| RSCM | Royal School of Church Music (UK) |
| RSCN | Royal Society for the Conservation of Nature |
| RSDS | Reflex Sympathetic Dystrophy Syndrome |
| RSDSA | Reflex Sympathetic Dystrophy Syndrome Association |
| RSDSAA | Reflex Sympathetic Dystrophy Syndrome Association Of America |
| RSJ | Robotics Society of Japan |
| RSL | Retired Servicemen's League |
| RSNC | Royal Society for Nature Conservation |
| RSO | Regional Support Office |
| RSPB | Royal Society for the Protection of Birds |
| RSPCA | Really Special People Caring for Animals |
| RSPCA | Royal Society for the Prevention of Cruelty of Animals |
| RSPCC | Royal Society for Prevention of Cruelty to Children |
| RSRF | Rett Syndrome Research Foundation |
| RSSB | Rail Safety and Standards Board |
| RSVP | Retired Senior Volunteer Program |
| RSWR | Right Sharing-World Resources |
| RTAG | Regional Technical Advisory Group |