| Abbreviation | Definition |
|---|---|
| RB | Short-Range Coastal or River Boat |
| RB | Std Rubidium Standard |
| RB28 | Swedish Falcon |
| RB53 | antam Missile |
| RB53 | Bantam Missile |
| RBC | Red Banana Cult |
| RBD | Red Bull Division |
| RBD | Reliability Block Diagram |
| RBE | Realistic Battlefield Environment |
| RBE | Remain-Behind Equipment |
| RBECS | Revised Battlefield Electronic CEOI System |
| RBECS | Revised Battlefield Electronic Communications, Electronics, Intelligence, and Operations (CEIO) System |
| RBG | Rocket Boosted Glider |
| RBH | Really Big Hatch |
| RBI | RED/BLACK Isolator |
| RBL | Results- Based Leadership |
| RBL | Results-Based Leadership |
| RBO | Rota Burn Out |
| RBOC | Regional Big Operation Coordinator |
| RBOF | Receiving Basin for Offsite Fuel |