| D&F | Determination And Findings | - | Business and Finance |
| D-B | Davis-Bacon Act | - | Business and Finance |
| D/A | Digital-to-analogue Conversion | - | Business and Finance |
| D/L | Downlink | - | Business and Finance |
| D/RADEX | Digital Radar Experiment | - | Business and Finance |
| D/RADEX | Digital Radar Experiment | - | Business and Finance |
| DA | Drift Angle | - | Business and Finance |
| DA | Deka | - | Business and Finance |
| DAB | Defense Acquisition Board | - | Business and Finance |
| DAC | Douglas Aircraft Corporation | - | Business and Finance |
| DAC | Director's Advisory Committee | - | Business and Finance |
| DAC | Disaster Assistant Center | - | Business and Finance |
| DADS | Data Archive And Distribution System | - | Business and Finance |
| DAESRA | Denver Area Employees Service And Recreation Association | - | Business and Finance |
| DAF | Data Acquisition Facility | - | Business and Finance |
| DAF | Device Assembly Facility | - | Business and Finance |
| DAI | Data Assimilation Initiative | - | Business and Finance |
| DAIRS | Differential Absorption Infrared Sensor | - | Business and Finance |
| DAM | Data Access Management | - | Business and Finance |
| DAMUS | Data Management And User Services | - | Business and Finance |
| DAR | Data Acquisition Request | - | Business and Finance |
| DARE | Denver AWIPS Risk Reduction And Requirements Evaluation | - | Business and Finance |
| DARE-1 | A Weather Service Work Station At PROFS | - | Business and Finance |
| DARE-2 | A Weather Service Work Station At PROFS | - | Business and Finance |
| DARPA | Defense Advanced Research Projects Agency | - | Business and Finance |
| DARRRE | DAR3E | - | Business and Finance |
| DART | Data Assimilation Research Testbed | - | Business and Finance |
| DARTS | DOE Audit Reporting & Tracking System | - | Business and Finance |
| DAS | Data-Acquisition System | - | Business and Finance |
| DASA | Defense Atomic Support Agency | - | Business and Finance |
| DASC | Division Of Advanced Scientific Computing | - | Business and Finance |
| DASC | Defense Logistics Agency Administrative Support Center | - | Business and Finance |
| DASD | Direct Access Storage Device | - | Business and Finance |
| DASM | Design And Analysis Support Model | - | Business and Finance |
| DASMA | Deputy Assistant Secretary For Military Application | - | Business and Finance |
| DAT | Data Acquisition Test | - | Business and Finance |
| DAT | Digital Audio Tape | - | Business and Finance |
| DAWG | Data Assimilation Working Group | - | Business and Finance |
| DB | Direct Broadcast | - | Business and Finance |
| DB | Division Burden | - | Business and Finance |
| DBA | Data Base Administrator | - | Business and Finance |
| DBER | Division Of Biomedical And Environmental Research | - | Business and Finance |
| DBMS | Data Base Management System | - | Business and Finance |
| DBSS | Directed Balloon Sounding System | - | Business and Finance |
| DBX | Debugger For UNIX | - | Business and Finance |
| DBZ | Decibles | - | Business and Finance |
| DC | Direct Current | - | Business and Finance |
| DC | Dublin Core--metadata | - | Business and Finance |
| DCA | Washington National Airport | - | Business and Finance |
| DCA | Data Collection Assignment | - | Business and Finance |
| DCAA | Defense Contract Audit Agency | - | Business and Finance |
| DCAR | Data Collection Analysis Request | - | Business and Finance |
| DCC | Direct Connect Service | - | Business and Finance |
| DCE | Distributed Computing Environment | - | Business and Finance |
| DCF | Data Capture Facility | - | Business and Finance |
| DCG | Derived Air Concentration Guide For Uncontrolled Areas | - | Business and Finance |
| DCLS | Data Collection Location System | - | Business and Finance |
| DCM | Deep Convection Model | - | Business and Finance |
| DCO | Delayed Compliance Order | - | Business and Finance |
| DCP | Data Collection Platform | - | Business and Finance |
| DCR | Data Collection Request | - | Business and Finance |
| DCS | Direct Connect Service | - | Business and Finance |
| DCSL | Distributed CSL | - | Business and Finance |
| DCTN | Defense Commercial Telecommunications Network | - | Business and Finance |
| DCVZ | Denver Convergence Vorticity Zone | - | Business and Finance |
| DCX | Delta Clipper Experimental | - | Business and Finance |
| DD | Dated | - | Business and Finance |
| DD | Demonstration Division | - | Business and Finance |
| DD+ | Domestic Data Plus | - | Business and Finance |
| DDB | Delayed Direct Broadcast | - | Business and Finance |
| DDC | Defense Documentation Center | - | Business and Finance |
| DDD | Wind Direction | - | Business and Finance |
| DDE | Dynamic (or Direct) Data Exchange | - | Business and Finance |
| DDE | Distributed Data Environment | - | Business and Finance |
| DDESB | Department Of Defense Explosives Safety Board | - | Business and Finance |
| DDF | Digital Data Formatter | - | Business and Finance |
| DDHS | Digital Data Handling System | - | Business and Finance |
| DDN | Data Defense Network | - | Business and Finance |
| DDR | Deutsche Demokratische Republik | - | Business and Finance |
| DDS | Domestic Data Service | - | Business and Finance |
| DDS | Data Delivery Services | - | Business and Finance |
| DDS | Doctor Of Dental Science | - | Business and Finance |
| DE | Dynamics Explorer | - | Business and Finance |
| DEA | Drug Enforcement Administration | - | Business and Finance |
| DEAR | Department Of Energy Acquisition Regulation | - | Business and Finance |
| DEBITS | Deposition Of Biogeochemical Important Trace Species | - | Business and Finance |
| DEC | Digital Equipment Corporation | - | Business and Finance |
| DEC | DOE Environmental Checklist | - | Business and Finance |
| DECAFE | Dynamique Et Chimie De L'Atmosphere En Foret Equitoriale | - | Business and Finance |
| DECDOS | DEC's Version Of DOS | - | Business and Finance |
| DECMAIL | An Electronic Mail Facility Provided By DEC | - | Business and Finance |
| DECNET | Digital Equipment Corporation Network | - | Business and Finance |
| DECU | Developmental & Educational Communications Unit | - | Business and Finance |
| DECUS | Digital Equipment Computer Users Society | - | Business and Finance |
| DED | Data Element Directory | - | Business and Finance |
| DELNI | Digital Equipment Local Network Interconnect | - | Business and Finance |
| DEM | Digitized Elevation Models | - | Business and Finance |
| DEM | Digital Elevation Model | - | Business and Finance |
| DEMVAL | Demonstration And Validation | - | Business and Finance |
| DERF | Dynamic Extended Range Forecasting | - | Business and Finance |
