| Abbreviation | Definition |
|---|---|
| RA | Raistlins Apprentice |
| RAF | Richard's Animorphs Forum |
| RALJ | Redundant Arbiters of Lukewarm Justice |
| RBD | Realms Beyond Diablo |
| RBI | Roswell Bureau of Investigation |
| RCZ | Radioactive Communist Zombie |
| RD | Recreation Droid |
| RDF | Reality Distortion Field |
| RDF | Robotech Defense Force |
| RESPECT | Respect For Equality Socialism Peace Environment Community Trade |
| RESPECT | Respect for Equality, Socialism, Peace, Environment, Community, and Trade |
| RETS | Renagade End Time Soldier |
| RFR | Really Fast Robot |
| RIA | Rhydin Intelligence Agency |
| RIC | Romulan Imperial Command |
| RID | Robots In Disrepair |
| RIP | Revenge Is Planned |
| RISC | Romulan Imperial Space Control |
| RITU | Recoil Ion Transport Unit |
| RKAS | The Royal Kennebecasis Adventurers Society |