| Acronym | Meaning |
| DBDS | Data Base Design Specification |
| DBMS | Data Base Management System |
| DC | Data Collection |
| DC | Direct Current |
| DC | Display Controller |
| DCAA | Defence Contract Audit Agency |
| DCASMA | Defense Contratcts Administration Systems Agency |
| DCB | Dynamic Component Bulletin (tdc 52) |
| DCC | Dynamic Component Change (tdc 51) |
| DCE | Distributed Computing Environment |
| DCLT | Declutter |
| DCMC | Defense Contract Management Command |
| DCN | Defense Communications Network |
| DCN | Design Change Notice |
| DCP | Decision Coordinating Paper |
| DCT | Damage Control Tpnr (trident-21c11) |
| DD | Destroyer |
| DD | Digital Data |
| DD250 | Material Inspection And Receiving Report |
| DDG | Guided Missile Destroyer |
| DDL | Data Distribution List |
| DDM | Diagnostic Diagrams |
| DDN | Defense Data Network |
| DDN | Design Decision Notice |
| DDR&E | Design Development Research & Engineering |
| DDU | Digital Data Unit |
| DEC | Decode |
| DEC | Decrease |
| DEC | Digital Equipment Corporation |
| DEG | Degrees |
| DEL | Delete |
| DELT | Delta |
| DEMS | Data Base Management Sys |
| DEN | Data Element Number |
| DEP | Draft Equipment Publication |
| DEU | Display Electronics Unit |
| DF | Direction Finder |
| DFARS | Dod Federal Acquistion Regulation Supplement |
| DFAS | Defense Finance & Accounting Service |
| DFC | Diagnostic Flow Charts |
| DFP | Display Function Processor |
| DFR | Digital Flight Recorder |
| DGU | Display Generation Unit |
| DH | Decision Height |
| DHOV | Depart From Hover |
| DHV | Doors/hatches/vents |
| DIA | Defense Intelligence Agency |
| DICASS | Directional Command Activated Sonobouy System |
| DID | Data Item Description |
| DIFAR | Directional Frequency And Ranging (asw) |