| DDDL | Digital Data Downlink | In English | → Data |
| DDDS | Digital Data Distribution System | In English | → Data |
| DDDS | Drug Discovery and Development Summit | In English | → Pharmacology, toxicology |
| DDDU | Display Decoder Driver Unit | In English | |
| DDES | Data Display Expert System | In English | |
| DDEX | Digital Data Exchange | In English | → Data |
| DDHA | Digital Data-Handling Assembly | In English | |
| DDI | Discrete Data Input | In English | → Data |
| DDI | Discrete Digital Input | In English | |
| DDIA | Dubai Development and Investment Authority | In English | → 33972 → Development |
| DDL | Display Description Language | In English | → Human-computer interaction |
| DDL | Data Base Definition Language | In English | → Computer science |
| DDL | Data Downlink | In English | → Data |
| DDL | Distributed Design Language | In English | |
| DDL | Data Definition Language | In English | |
| DDM | Distributed Design Methodology | In English | |
| DDM | Distributed Data Manager | In English | → Data |
| DDM | Discrete Data Management | In English | → Data |
| DDM | Data Display Monitoring | In English | |
| DDM | Data Display Module | In English | → Human-computer interaction → Data |
| DDN | Defense Data Network | In English | → Networks, communication → Military affairs |
| DDO | Discrete Data Output | In English | → Data |
| DDO | Discrete Digital Output | In English | |
| DDORe | David Dunlap Observatory Richmond Hill Reprints | In English | → Serial publications, periodicals → Astronomy |
| DDP | Data Distribution Panel | In English | → Data |
| DDP | Design Development Plan | In English | |
| DDP | Design Data Package | In English | |
| DDP | Digital Data Processing | In English | → Data |
| DDP | Data Distribution Plan | In English | → Data |
| DDP | Disc Description Protocol | In English | → Cinema, movies → Telecommunications |
| DDP | Daughters of Divine Providence | In English | → Roman catholic church |
| DDPC | Digital Data Processing Complex | In English | → Data |
| DDPC | Digital Data Processing Center | In English | → Data |
| DDPF | Dedicated Display Processing Function | In English | |
| DDPS | Digital Data Processing System | In English | → Data |
| DDR | Data Display and Review | In English | → Data |
| DDR | Design Development Record | In English | |
| DDR | Data Display Room | In English | → Data |
| DDR | Detail Design Review | In English | |
| DDS | Data Display System | In English | |
| DDS | Descent Design System | In English | |
| DDS | Detailed Design Specification | In English | |
| DDS | Documentation Distribution System | In English | → Knowledge management → Libraries |
| DDS | Drug Delivery System | In English | → Pharmacology, toxicology |
| DDTF | Dynamic Docking Test Facility | In English | |
| DDTS | Dynamic Docking Test System | In English | |
| DDU | Decommutator Distribution Unit | In English | |
| DDU | Digital Display Unit | In English | |
| DDU | Data Display Unit | In English | → Human-computer interaction → Data |
| DDU | Display Driver Unit | In English | |
| DE | Design Engineering | In English | |
| DE | Display Electronics | In English | → Electronics |
| DE | Doppler Extractor | In English | |
| DE | Donor Eggs | In English | → Reproductive biology |
| DEA | Development Education Association | In English | → Associations → Education |
| DEA | Deployed Electronics Assembly | In English | → Electronics |
| DEA | Digital Electronics Assembly | In English | → Electronics |
| DEA | Display Electronics Assembly | In English | → Electronics |
| DeaCo | Dearborn Observatory Contributions | In English | → Serial publications, periodicals → Astronomy |
| DEAT | Donegal Energy Action Team | In English | → Energy economics |
| DEC | Digital Equipment Corporation | In English | |
| DECL | Deliverable Equipment Checklist | In English | |
| DECL | Direct Energy Conversion Laboratory | In English | → Research institutes → Energy economics |
| DECNET | Digital Equipment Corporation Network | In English | |
| DECT | Digital Enhanced Cordless Telecommunications | In English | → Telecommunications |
| DECT | Digital Enhanced Cordless Telecommunication | In English | → Telecommunications |
| DECU | Data Exchange Control Unit | In English | |
| DEDA | Data Entry and Display Assembly | In English | |
| DEE | Digital Events Evaluator | In English | |
| DEF | Development and Evaluation Facility | In English | |
| DefEl | Defense Electronics | In English | → Serial publications, periodicals → Military affairs → Electronics → Military engineering |
| DEFRA | Department of Environment, Food and Rural Affairs | In English | → Central administration → Agricultural sciences → Food technology |
| DEI | Design Engineering Identification | In English | |
| DEI | Deliverable End Item | In English | |
| DEI | Design Engineering Inspection | In English | |
| DEI | Design, Engineering, and Integration | In English | |
| DEIS | Design Evaluation and Inspection Simulator | In English | |
| DEIS | Design Engineering Inspection Simulation | In English | |
| DEL | Deorbit, Entry, and Landing | In English | |
| DELMIA | Digital Enterprise Lean Manufacturing Interactive Application | In English | → Computer-based techniques → Engineering, technology |
| DELNI | Digital Ethernet Local Network Interconnect | In English | → Computer science |
| DELOG | Design Engineering Logistics | In English | → Maintenance and logistics |
| DELTA | Detailed Labor and Time Analysis | In English | |
| DEOS | Data Enrollment Online Server | In English | → Networks, communication |
| DEOSS | Demonstration of Electro-Optical Surveillance Sensor | In English | |
| DEP | Display Electronics Package | In English | → Electronics |
| DEP | Deflection Error Probable | In English | |
| DEP | Dedicated Experienced Processor | In English | |
| DER | Drawing Error Report | In English | |
| DES | Data Exchange System | In English | |
| DES | Drug Eluting Stent | In English | → Pharmacology, toxicology |
| DES | Data Encryption Standard | In English | → Computer-based techniques → Mathematics |
| DeScE | Defense Science Electronics | In English | → Serial publications, periodicals → Military affairs → Electronics → Military engineering |
| DESHE | Distributed Expert System Hosting Environment | In English | |
| DESI | Desorption Electrospray Ionization | In English | |
| DESIRE | Development of a European Service for Information on Research and Education | In English | → Research policy → Libraries → Knowledge management → Education |
| DESPOT | Design Performance Optimization | In English | |
| DET | Digital Event Timer | In English | |
| DET | Direct Energy Transfer | In English | → Energy economics |
| DETA | Diethylene Triamine | In English | |
| DETEC | Defensive Technology Evaluation Code | In English | |
| DETIR | Defensive Technology Information Repository | In English | |
| DEU | Digital Electronics Unit | In English | → Electronics |
| DEU | Display Electronics Unit | In English | → Electronics |
| DEUA | Disabled Ebay Users Association | In English | → Associations → Internet → Trade |
| DEW | Directed-Energy Weapon | In English | → Military engineering |
| DEW | Distant Early Warning | In English | |
| DF | Disassembly Facility | In English | |
| DF | Development Flight | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DF | Development Forward | In English | |
| DF | Direct Flight | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DF | Direction Finder | In English | |
| DF | Drop Forge | In English | |
| DF | Double Feeder | In English | |
| DF | Drawing File | In English | |
| DFA | Defence Families of Australia (www.dfa.org.au) | In English | → Organizations and associations → Military affairs |
| DFA | Dimensional Fund Advisors (www.dfaus.com) | In English | → Financial markets |
| DFA | Department of Finance and Administration | In English | → Management → Finance |
| DFA | Democracy for America (www.democracyforamerica.com) | In English | → Political parties and movements |
| DFA | Detrended Fluctuation Analysis | In English | → Mathematics |
| DFA | Dutch Flight Academy (www.dfa-fto.nl) | In English | → Specialized or (poly)technical colleges → Aeronautics, aircraft → Transport and postal services |
| DFA | Department of Foreign Affairs | In English | → International relations |
| DFA | Death From Above | In English | → Music |
| DFA | Darts Federation of Australia (www.dfadarts.org) | In English | → Organizations and associations → Entertainment |
| DFCS | Digital Flight Control Software | In English | → Software → Aeronautics, aircraft → 62989 |
| DFCS | Digital Flight Control System | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DFD | Data Flow Diagram | In English | → Data |
| DFE | Direction-Finding Equipment | In English | |
| DFE | Distributed Framework Executive | In English | |
| DFE | Data Flow Engineer | In English | → Data |
| DfEE | Department for Education and Employment | In English | → Central administration → Labour, labour economics → Education |
| DfES | Department for Education and Skills | In English | → Central administration → Education |
| DFFF | Davis Feminist Film Festival | In English | → Feminism → Cinema, movies |
| DFG | Display Format Generator | In English | → Human-computer interaction |
| DFG | Diode Function Generator | In English | |
| DFI | Development Flight Integration | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DFI | Development Flight Instrumentation | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DFL | Decommutator Format Load | In English | |
| DFR | Document Filing and Retrieval | In English | |
| DFRC | Dryden Flight Research Center | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DFRF | Dryden Flight Research Facility | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DFS | Directional Finding System | In English | |
| DFS | Dynamic Flight Simulator | In English | → Computer simulation → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DFSA | Digital Free Software Association | In English | → Associations → Software |
| DFT | Design For Testability | In English | |
| DFT | Discrete Fourier Transform | In English | → Mathematics |
| DFT | Density Functional Theory | In English | → Physics |
| DFT | Density-Functional Theory | In English | → Physics → Quantum chemistry |
| DG | Dentate Gyrus | In English | → Biological sciences → Anatomy |
| DG | Directorate General | In English | → Management |
| DG | Data Group | In English | |
| DG | Display Generator | In English | |
| DGA | Directors Guild of America (www.dga.org) | In English | → Organizations and associations → Cinema, movies |
| DGSM | Directorate General for Specifications and Measurements | In English | → Standardization |
| DGT | Digital Gene Technologies | In English | → Biotechnology |
| DGU | Display Generator Unit | In English | |
| DGU | Digital Graphics Unit | In English | |
| DGZ | Desired Ground Zero | In English | |
| DH | Decision Height | In English | |
| DHA | Design Hazards Analysis | In English | |
| DHCP | Dynamic Host Configuration Protocol | In English | → Networks, communication |
| DHE | Data Handling Equipment | In English | |
| DHF | Dengue Hemorrhagic Fever | In English | → Infectious diseases |
| DHHS | Department of Health and Human Services (www.hhs.gov) | In English | → Medicine |
| DHP | Developed Horsepower | In English | |
| DHR | Directory of Human Rights Resources | In English | → Libraries → Fundamental rights |
| DHS | Department of Human Services | In English | → Public administration, government |
| DHS | Department of Health Services | In English | → Public administration, government → Public health and hygiene |
| DHS | Dead Hackers Society | In English | → Organizations and associations → Computer science |
| DHS | Department of Homeland Security | In English | → Public administration, government |
| DHS | Departement of Homeland Security | In English | → Central administration |
| DHS | Discrete Horizon Sensor | In English | |
| DHT | Dance.House.Trance | In English | → Dance |
| DHT | Distributed Hash Table | In English | → Data |
| DHTML | Dynamic Hypertext Markup Language | In English | → Programming languages → Data |
| DI | Donor Insemination | In English | → Reproductive biology |
| DI | Desk Instruction | In English | |
| DI | Discrete Input | In English | |
| DI | Data Integrator | In English | |
| DIA | Defense Intelligence Agency | In English | → Military affairs |
| DIAID | Division of Immunology, Allergy & Infectious Diseases | In English | → Immunology and allergy → Infectious diseases |
| DIAL | Document Image Analysis for Libraries | In English | → Document processing |
| DIC | Deviance Information Criterion | In English | |
| DIC | Disseminated Intravascular Coagulation | In English | → Blood and circulatory system → Pathology |
| DICE | Danube Integrated Circuit Engineering | In English | → Electronics |
| DICE | Digital Innovation through Cooperation in Europe | In English | → Computer science → Engineering, technology |
| DID | Data Item Description | In English | |
| DID | Defense In Depth | In English | → Computer science → Military affairs |
| DIDS | Defense Integrated Data System | In English | → Military engineering |
| DIDSIM | Defense-In-Depth Simulation | In English | → Military engineering |
| DIDTHT | Defense-In-Depth Threat | In English | → Military engineering |
| DIEU | Digital Interface Electronics Unit | In English | → Human-computer interaction → Electronics |
| DIGEOHOS | Differential Geometry of Quantum Homogeneous Spaces | In English | → Geometry → Differential calculus |
| DIH | Discrete Input High | In English | |
| DII | Defense Industry Initiative | In English | → Military affairs → Industry, industrial policy → Military engineering |
| DIL | Deliverable Items List | In English | |
| DIL | Discrete Input Low | In English | |
| DILSA | Distributed Integrated Logistics Support Analysis | In English | → Maintenance and logistics |
| DIM | Design Interface Meeting | In English | → Human-computer interaction |
| DIM | Design Information Manual | In English |
|