| Abbreviation | Definition |
|---|---|
| DWR | Duke of Wellington's Regiment |
| DWR | Durable Water Repellent |
| DWRIA | Died of Wounds Received In Action |
| DWRS | Dental Workload Reporting System |
| DWS | Defense Weapon System |
| DWS | Distributed Wargaming System |
| DWT | Daylight Wasting Time |
| DWT | Deadweight Tonnage |
| DWTA | Dynamic Weapon Target Assignment |
| DWTS | Digital Wideband Transmission System |
| DX | Direct Exchange |
| DX | Directorate for External Relations (DIA) |
| DYE | Caper Dyer (DEW Line) |
| DYNATIC | Dynamic Analysis of the Theater Intelligence Center |
| DYNTACS-X | Dynamic Tactical Simulator (computer model) |
| DZ | Demilitarize Zone |
| DZ | Demilitarized Zone |
| DZ | Drop Zone |
| DZAAS | Drop Zone Assembly Aids System |
| DZC | Drop Zone Controller |