| Abbreviation | Definition |
|---|---|
| DDN | Defense Data Network |
| DDN | Don't Do Nothing |
| DDO | Deputy Director of Operations |
| DDO | Deputy Director Office |
| DDOC | USTRANSCOM (United States Transportation Command) Deployment and Distribution Operations Center |
| DDOP | Department of Defense and Operational Planning |
| DDP | Detailed Demonstration Plan |
| DDP | Detailed Deployment Plan |
| DD-PATH | Decision-to-Decision Path |
| DDR | Die Deutsche Remilitarisirung |
| DDR | Disarmament, Demobilization, and Reintegration |
| DDR&E | Director of Defense Research and Engineering |
| DDRE(T&E) | Deputy Director of Defense Research and Engineering (Test and Evaluation) |
| DDRRR | Disarmament, Demobilization, Repatriation, Reintegration, and Resettlement |
| DDRS | Defense Data Repository System (now DDDS) |
| DDRS | Defense Data Repository System (now DDDS) |
| DDRT | Defense Distribution Depot Red River, Texas |
| DDS | Dark Deadly Snipers |
| DDS | Data Distribution System |
| DDS | Deep Dive System |