| Abbreviation | Definition |
|---|---|
| RRB | Robinson Ranger Brigade |
| RRB | Round Rod Bayonet |
| RRB | rRNA and ribosome biosynthesis |
| RRBC | Re Radiating Boundary Condition |
| RRBC | Riff Raff Brewing Co |
| RRBI | Red River Basin Initiative |
| RRBI | Repetitive And Restricted Behaviors And Interests |
| RRBI | Restricted Repetitive Behaviors And Interests |
| RRBI | Revista Romana de BOLI INFECTIOASE |
| RRBO | Rouge River Bird Observatory |
| RRBSC | RRB Secunderabad |
| RRBT | Radical Reps Baseline Training |
| RRBT | Reduced Redundancy Block Transceivers |
| RRBT | Reverse Ring Back Tune |
| RRBT | Roman Reigns Believe That |
| RRC | radiative recombination continuum |
| RRC | Radio Resource Controller |
| RRC | Railway Recruitment Cell |
| RRC | Range Resources Corp |
| RRC | Rational Requirements Composer |