| Acronym | Meaning |
 | DFRN | Differential |
| DFRN | PRESSDifferential Pressure |
| DFS | Directional Finding System |
| DFS | Dynamic Flight Simulator |
| DFVLR | Deutsche Forschungs-und Versuchsanstalt Luft-u |
| DG | Display Generator |
| DH | Decision Height |
| DHA | Design Hazards Analysis |
| DHE | Data-handling Equipment |
| DHS | Discrete Horizon Sensor |
| DI | Data Integrator |
| DI | Development Integration |
| DI | Discrete Input |
| DI | Display Interface |
| DI | Display Interface Processor (Software Functional Element) |
| DIA | Diameter |
| DIAG | Diagonal |
| DIAGN | Diagnose |
| DIDS | Defense Integrated Data System |
| DIF | Difference |
| DIF | Discrete Increment Filter |
| DIFF | Differential |
| DIGI | Digital |
| DIH | Discrate Input High |
| DIH | Discrete Input High |
| DIL | Deliverable Items List |
| DIL | Discrete Input Low |
| DIM | Design Interface Meeting |
| DIMEN | Dimension |
| DIP | Designated Inspection Point |
| DIP | Display Input Processor |
| DIP | Display Interface Processing (Processor) |
| DIPEC | Defense Industrial Plant Equipment Center |
| DIPL | Display Initial Program Load |
| DIR | Direct |
| DIR | Document Information Record |
| DIS | Disagree |
| DIS | Documentation Index System |
| DISAP | Disapproved |
| DISASSY | Disassembly |
| DISC | Discone |
| DISC | Disconnect |
| DISC | Discrete |
| DISCH | Discharge |
| DISENG | Disengage |
| DISP | Dispenser |
| DISP | Display |
| DIST | Distribution |
| DISTR | Digital Interface Unit |
| DISTR | Distributor |
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