| Abbreviation | Definition |
|---|---|
| DETN | DETectioN |
| DETR | DETectoR |
| DEU | Display Electronics Unit |
| DEV | DEVelop |
| DEVELOP | Digital Earth Virtual Environment And Learning Outreach Project |
| DEVN | DEViatioN |
| DF | Development Flight |
| DF | Development Forward |
| DF | Disassembly Facility |
| DF | Display Function |
| DFCD | Data Format Control Documents |
| DFCS | Digital Flight Control System |
| DFE | Data Flow Engineer |
| DFE | Direction Finding Equipment |
| DFG | Display Format Generator |
| DFI | Development Flight Instrumentation |
| DFR | DeFRost |
| DFRC | Hugh L. Dryden Flight Research Center |
| DFRF | Dryden Flight Research Facility |
| DFRN | DiFfeReNtial |