| Abbreviation | Definition |
|---|---|
| RRTS | Radio Radio TV Sleep |
| RRU | Race Relations Unit |
| RRU | Radio Remote Unit |
| RRU | Rapid Response Units |
| RRU | Rapid Review Unit |
| RRU | Rapide Review Unit |
| RRU | Reading Round Up |
| RRU | Relative Resource Use |
| RRU | Remote Radio Unit |
| RRU | Remote Radio Units |
| RRU | Reporting Results Unit |
| RRU | Respiratory Resistance Unit |
| RRU | Right Response Unit |
| RRU | Royal |
| RRU | Royal Roads |
| RRU | Rudder Reference Unit |
| RRUS | Ridgeback Rescue of the United States |
| RRV | Radiosity Renderer and Visualizer |
| RRV | Relative Reward Value |
| RRV | Reliability Resilience and Vulnerability |