| Abbreviation | Definition |
|---|---|
| DCU | Display Control Unit |
| DCW | Digital Chart of the World |
| DD | Data Devices |
| DD | Defensive Damage |
| DD | Department of Defense |
| DD | Deployment Descriptor |
| DD | Destroyer |
| DD | Direct Damage |
| DD | DMS Discretion |
| DD | Duplex Drive |
| DD/D | Data Dictionary/Directory |
| DDA | Deputy Director for Administration |
| DDA | Designated Development Activity |
| DDA | Division Design Analysis |
| DDA | Don't Defy America |
| DDASS | Division DSU Automated Supply System |
| D-DAY | Unnamed Day on which Operations are scheduled to Commence |
| DDBL | Dismounted Battlespace Battle Lab |
| DDBP | Dedicated Database Processor |
| DDC | D C-to- D C Converter |