| Abbreviation | Definition |
|---|---|
| RSN | Radio Sound Network |
| RSN | Reader Supported News |
| RSN | Religious Studies News |
| RSS | Really Simple Syndication |
| RSS | Rich Site Summary |
| RST | Radio Systems Technology |
| RTBN | Radio Television and Broadcast News |
| RTFN | Read The Freaking News |
| RTW | Rock The World Productions, Inc. |
| RUMINT | RUMor INTelligence |
| RUMINT | RUMour INTelligence |
| RYP | Rangjung Yeshe Publications |
| S/B | Spongebob |
| SAEN | San Antonio Express-News |
| SAN | Antonio news |
| SAN | Shopping As News |
| SANA | Syrian Arab News Agency |
| SANTA | Satanist Accounting National Television Association |
| SANTA | Satanist Accounting National Television Association |
| SBG | Sinclair Broadcast Group |