| RCU | Rack Controller Unit 
| Others |
| RCU | Rackmount Control Unit
| Others |
| RCU | Radar Control Unit
| Others |
| RCU | Radio Channel Unit
| Others |
| RCU | Radio Control Unit
| Others |
| RCU | Radio Control Universe
| Others |
| RCU | Rapid Cooling Unit
| Others |
| RCU | Rate Changes Unit
| Others |
| RCU | Read Capacity Units
| Others |
| RCU | Read Copy Update
| Others |
| RCU | Ready Copy Update
| Others |
| RCU | REALTORS Credit Union
| Others |
| RCU | Rear Control Unit
| Others |
| RCU | Recessed Commercial Unit
| Others |
| RCU | Recuperative Care Unit
| Others |
| RCU | Redwood Credit Union
| Others |
| RCU | Reformed Church University
| Others |
| RCU | Regular care unit
| Others |
| RCU | Remote Camera Unit
| Others |
| RCU | Remote Control Unit
| Others |
| RCU | Remote Control Utility
| Others |
| RCU | Renault Classique Utilitaires
| Others |
| RCU | Repository Creation Utility
| Others |
| RCU | Requisition Control Unit
| Others |
| RCU | Research Coordination Unit
| Others |
| RCU | Reserve Component Unit
| Others |
| RCU | Respiratory Care Unit
| Others |
| RCU | Revelar Connection Utility
| Others |
| RCU | Ricky Carmichael University
| Others |
| RCU | Rio Cuarto, CD, Argentina
| Others |
| RCU | Rip City United
| Others |
| RCU | Risk Control Unit
| Others |
| RCU | Roadside Communicator Unit
| Others |
| RCU | Robot Chicks Union
| Others |
| RCU | Rocket Control Unit
| Others |
| RCU | Room Control Unit
| Others |
| RCU | Royal Credit Union
| Others |