List of Government Acronyms: D
| Acronym | Agency/Organization/Definition |
| DAU | Defense Acquisition University |
| DC | Developed Country |
| DDN | Defense Data Network |
| DEA | Drug Enforcement Administration |
| DHS | Department of Homeland Security |
| DIA | Defense Intelligence Agency |
| DISA | Defense Information Systems Agency |
| DLA | Defense Logistics Agency |
| DNFSB | Defense Nuclear Facilities Safety Board |
| DOD | U.S. Department of Defense |
| DODEA | Department of Defense Education Activity |
| DOE | Department of Energy |
| DOL | Department of Labor |
| DOT | Department of Transportation |
| DSS | Defense Security Service |
| DSN | Defense Switched Network |
| DTRA | Defense Treat Reduction Agency |
| DTSA | Defense Technology Security Administration |
