| Abbreviation | Definition |
|---|---|
| RSPND | Respond |
| RTF | Read The FAQ |
| RTFM | Read The Factory Manual |
| RTFM | Read The Flippin Manual |
| RTI | Radical Tire Inclination |
| RTT | Reply To This |
| RTT | Request To Talk |
| RU | Are You .... |
| RU/18 | Are You over 18? |
| RUF | Rough |
| RUJ | aRe yoU Joking? |
| RUK | aRe yoU Kidding? |
| RUOK? | Are yoU OK? |
| RUX | aRe yoU eXperienced? |
| RW | Regardless of Whether .... |
| RYQ | Regarding Your Query |
| RYT | Read Your Text |
| RYT | Reference Your Telex |
| RYT | Right |
| RZR | Razor |