| Abbreviation | Definition |
|---|---|
| RDNH | Reverse Domain Name Hijacking |
| RDNS | Reverse Domain Name Service |
| RIR | Regional Internet Registry |
| RM | Repair Management |
| RPGM | Role Playing Game Manager |
| RRD | Radiant Radical and Dynamic |
| RRDRP | Registry Restrictions Dispute Resolution Procedure |
| RRT | Ahmed |
| RT | Rotten Tomatoes |
| RTT | Real Train Times |
| RWV | Reasoning With Vampires |
| SCP | ShareCodePoint |
| SELENATOR | A fan of Selena Marie Gomez |
| SSEW | Small Server at the End of the World |
| STLD | Sponsored Top Level Domain |
| TDNAM | The Domain Name Aftermarket |
| TFL | The Forsaken Legion |
| TK | Tokelau |
| TLD | Top Level Domain |
| TLDN | Top Level Domain Name |