| Abbreviation | Definition |
|---|---|
| RDC | Research and Development Center |
| RDCFP | Regional Defense Counterterrorism Fellowship Program |
| RDCO | Regional Document Control Officer |
| RDCTFP | Regional Defense Combating Terrorism Fellowship Program |
| RDD | Radioactive Destruction Device |
| RDD | Radiological Dispersal Device |
| RDD | Required Delivery Date |
| RDD | Requirement Driven Design |
| RDD | Requirements Description Document |
| RDD | Requirements Documentation Directorate |
| RDD | Research and Development Document |
| RDDS | Range Data Distribution System |
| RDDT&E | Research, Development, Demonstration, Testing and Evaluation |
| RDE | Research, Development, and Engineering |
| RDEC | Research Development and Engineering Center |
| RDECOM | US Army Research, Development, and Engineering Command |
| RDES | Requirements Determination and Execution System |
| RDF | Radio Direction Finder |
| RDF | Radio Direction Finding |
| RDF | Rapid Deployment Force |