| Abbreviation | Definition |
|---|---|
| DDOT | District Department of Transportation's |
| DDP | Delivered Duty Paid |
| DDPS | Dual Driver Protective Service |
| DDT | Deflagration-To-Detonation Transition |
| DDU | Deliver Duty Unpaid |
| DE | DElayed |
| DEAL | Digital Energy Atlas Library |
| DEAL | Distributed Engine For Advanced Logistics |
| DEC | Drug Evaluation and Classification |
| DELTA | Doesn't Ever Leave The Airport |
| DEMOB | Demobilisation |
| DEMSTAT | Deployment / Employment / Mobilization Status System |
| DEN | Denver Amtrak Station |
| DEN | Stapleton International Airport |
| Dep. | departure (time) |
| DERV | Diesel Engine Road Vehicle |
| DERV | Diesel Engined Road Vehicle |
| DERV | Diesel Engined Road Vehicles |
| DERV | Diesel Engines Road Vehicles |
| DET | Detroit Amtrak Station |