| Abbreviation | Definition |
|---|---|
| RDF | Resource Data File |
| RDM | Real-time Data Manager |
| RDM | Research Double Module |
| RDMTR | Radiometer |
| RDOC | Reference Designation Overflow Code |
| RDOUT | Readout |
| RDP | Receiver and Data Processor |
| RDP | Requirements Data Plan |
| RDP | Requirements Development Plan |
| RDR | Raw Data Recorder |
| RDR | Rudder |
| RDS | Rocketdyne Digital Simulator |
| RDTR | Radiator |
| RDW | Response Data Word |
| RDW | Return Data Words |
| RDX | Cyclotrimethylenetrinitramine |
| RE | Earth Radii |
| RE | Responsible Engineer |
| RE&T | Research Engineering and Test |
| REAC | Reactant |