| Abbreviation | Definition |
|---|---|
| DFRNPRESS | DiFfeReNtial PRESSure |
| DFS | Direction Finding System |
| DFS | Dynamic Flight Simulator |
| DF-SPE | Directorate for Facilities and Systems Management, Shuttle Project Engineering Office |
| DFVLR | Deutsche Forschungs-und Versuchsanstalt Luft-und Raumfahrt |
| DG | Display Generator |
| DGIB | DSN/GSFC Interface Blocks |
| DGS | Diego Garcia Station |
| DH | Decision Height |
| DHA | Design Hazards Analysis |
| DHE | Data Handling Electronics |
| DHP | Direct High Power |
| DHS | Discrete Horizon Sensor |
| DHSS | Data Handling Subsystem |
| DI | Data Integrator |
| DI | Development Integration |
| DI | Direct Ignition |
| DI | Discrete Input |
| DI | Display Interface |
| DI | Doppler Inertial |