| Abbreviation | Definition |
|---|---|
| RPHD | Radio Paradise High Definition slideshow |
| RQC | Rage Quit Central |
| RT | Rooster Teeth |
| RVC | Rendez-Vous Canada |
| RWD | Responsive Website Design |
| RWO | Red and White Online |
| S4 | STANDS4 |
| S4BOT | Stands4 Bot |
| SABB | Self-Adjusting Bushing Bearing |
| SABF | Self Advocates for a Brighter Future |
| SABRE | Sell And Buy Real Estate |
| SASRP | San Andreas State Role Play |
| SBTV | Swagbucks TV |
| SC | SoundCloud |
| SCAS | Super Cool And Special |
| SCIP | Student Computing and Information Page |
| SCN | Shepherd's Chapel Network |
| SCRAN | Scottish Cultural Resources Access Network |
| SCRBs | Special Content Result Blocks |
| SCWD | San Clemente Website Design |