| Abbreviation | Definition |
|---|---|
| DEAS | Drug Enforcement Agency Structure |
| DEB | Division of Environmental Biology |
| DECA | Defense Commissary Agency |
| DECRM | Division of Environmental and Cultural Resources Management |
| DEEOIC | Division of Energy Employees Occupational Illness Compensation |
| DELEG | Department of Energy, Labour & Economic Growth |
| DELTA | Don't Even Let Them Aboard |
| DEM | Defense Environmental Management |
| DEP | Doing Everything Possible |
| DEPB | Duty Exemption Pass Book |
| DEPO | Disability Employment Policy Office |
| DEPORT | Detention Enforcement and Processing Offenders by Remote Technology |
| DERT | Division of Extramural Research and Training |
| DES | Department of Environmental Services |
| DES | Disability Evaluation System |
| DESA | Department of Economic and Social Affairs |
| DESC | Defense Energy Support Center |
| DESPR | Division of Epidemiology, Services and Prevention Research |
| DF | Duty Free |
| DFA | Department of Finance and Administration |