| DIGEC | Direction de l’Industrie, du Gaz, de l’Électricité et du Charbon | In French | → Central administration → Energy economics → Electrical engineering → Mining |
| DII | Defense Industry Initiative | In English | → 355 → Industry, industrial policy → Military engineering |
| DIN | Division Ingénierie Nucléaire | In French | → Nuclear technology |
| DINS | Defense Inertial Navigation System | In English | → Military engineering |
| DIP | Dual In-line Package | In English | → Electronics |
| DIP | Déficit Immunitaire Primitif | In French | → 621017 → Pathology |
| DIPEC | Defense Industrial Plant Equipment Center | In English | → Military engineering |
| DIPS | Dynamic Isotope Power System | In English | → Energy economics |
| DIRCEN | Direction des Centres d'Expérimentations Nucléaires | In French | → Nuclear technology |
| DIRD | Dépense Intérieure de Recherche et de Développement | In French | → Research policy → Public finance |
| DIRDE | Dépense Intérieure de Recherche et Développement des Entreprises | In French | → Research policy → Public finance |
| DIS | Déchets Industriels Spéciaux | In French | → Nature → Environmental technology, water supply, waste management |
| DIS | Defense Industrial Security | In English | → 355 → Military engineering |
| DISCO | Defense Industrial Security Clearance Office | In English | → 355 → Military engineering |
| DIT | Diplôme d'Ingénieur Technologue | In French | → Specialized or (poly)technical colleges |
| DKE | Deutsche Kommission Elektrotechnik, Elektronik, Informationstechnik im DIN und VDE | In German | → Organizations and associations → Computer science → Electrical engineering → Electronics |
| DLO | Director of Launch Operations | In English | → Spaceflight engineering, astronautics |
| DLR | Deutsche Forschungsanstalt für Luft- und Raumfahrt | In German | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DLR | Deutsches Zentrum für Luft- und Raumfahrt | In German | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DM | Development Motor | In English | → Vehicle engineering |
| DMA | Dose Maximale Admissible | In French | → Nuclear technology |
| DMA | Drive Motor Assembly | In English | → Vehicle engineering |
| DME | Direction des Missiles et de l'Espace | In French | → Military engineering → Spaceflight engineering, astronautics |
| DMS | Docking Module System | In English | → Mechanical engineering |
| DMS | Docking Mechanism Subsystem | In English | → Mechanical engineering |
| DMSP | Defense Meteorological Satellite Program | In English | → Meteorology, climatology → Military engineering → Spaceflight engineering, astronautics |
| DMSP | Defense Meterological Satellite Program | In English | → 355 → Meteorology, climatology → Spaceflight engineering, astronautics |
| DMSS | Defense Meteorological Satellite System | In English | → Meteorology, climatology → Military engineering → Spaceflight engineering, astronautics |
| DMU | Digital Mock-Up | In English | → Computer-based techniques |
| DNA | Defense Nuclear Agency | In English | → 355 → Nuclear technology |
| DNA | Direction de la Navigation Aérienne | In French | → Spaceflight engineering, astronautics → Transport and postal services |
| DNO | Descending-Node Orbit | In English | → Spaceflight engineering, astronautics |
| DNS | Departure Nuclear Stage | In English | → Nuclear technology |
| DNW | Deutsch-Niederländische Windkanäle | In German | → Aerodynamics → Aeronautics, aircraft |
| DOAAT | Direction Optimisation Amont/Aval et Trading | In French | → Electrical engineering |
| DOC | Drift-Orbit Correction | In English | → Spaceflight engineering, astronautics |
| DODSTP | Department of Defense Standard Satellite | In English | → 355 → Spaceflight engineering, astronautics |
| DOE | Dossier des 0uvrages Exécutés | In French | → Civil engineering → Building |
| DOE | Department of Energy | In English | → Central administration → Energy economics |
| DOI | Descent Orbit Insertion | In English | → Spaceflight engineering, astronautics |
| DOI | Direct Orbit Insertion | In English | → Spaceflight engineering, astronautics |
| DoLAEM | Dobrich Local Agency for Energy Management | In English | → Energy economics |
| DOMSAT | Domestic Satellite | In English | → Spaceflight engineering, astronautics |
| DORD | Deep Ocean Resources Development Company | In English | → Marine research, oceanography → Mining |
| DORIS | Determination of Orbit Radio Positioning Integrated from Shuttle | In English | → Telecommunications → Spaceflight engineering, astronautics |
| DOWNVInD | Distant Offshore Wind farms with No Visual Impact in Deepwater | In English | → Energy economics |
| DPA | Departamentul pentru Armamente | In Romanian | → Public administration, government → Military engineering |
| DPAC | Direction des Programmes Aéronautiques Civils | In French | → Aeronautics, aircraft |
| DPCT | Diplôme de Premier Cycle Technologique | In French | → Specialized or (poly)technical colleges |
| DPGF | Décomposition du Prix Global et Forfaitaire | In French | → Prices → Civil engineering → Building |
| DPM | Dinamika i Prochnost' Mashin | In English | → Serial publications, periodicals |
| DPN | Division Production Nucléaire | In French | → Nuclear technology |
| DPP | Division Particuliers et Professionnels | In French | → Trade → Electrical engineering |
| DPS | Descent Propulsion System | In English | → Spaceflight engineering, astronautics |
| DPS | Department of Defense Project Specification | In English | → 355 → Military engineering |
| DPTH | Division Productions Thermiques et Hydrauliques | In French | → Energy economics → Electrical engineering |
| DRCR | Direction des Routes et de la Circulation Routière | In French | → Civil engineering → Transport and postal services |
| DREIF | Direction Régionale de l'Équipement d'Île-de-France | In French | → Regional administration → Civil engineering |
| DRET | Direction des Recherches, Études et Techniques | In French | |
| DRET | Direction de la Recherche et de la Technologie | In French | → Research policy → Public administration, government |
| DRIE | Deep Reactive Ion Etching | In English | |
| DRM | Diamond and Related Materials | In English | → Serial publications, periodicals → 62039 |
| DRO | Dielectric Resonator Oscillator | In English | → Physics → Electrical engineering |
| DRRT | Délégation Régionale à la Recherche et à la Technologie | In French | → Research policy → Public administration, government |
| DRRT | Délégué(e) Régional(e) à la Recherche et à la Technologie | In French | → Research policy |
| DRS | Data Relay Satellite | In English | → Data → Spaceflight engineering, astronautics |
| DRSS | Data Relay Satellite System | In English | → Data → Spaceflight engineering, astronautics |
| DS3 | Deep-Space Surveillance System | In English | → Spaceflight engineering, astronautics |
| DSA | Defense Supply Agency | In English | → 355 → Military engineering |
| DSARC | Defense Systems Acquisition Review Council | In English | → Military engineering |
| DSARC | Defense System Acquisition Review Committee | In English | → Military engineering |
| DSAT | Defensive Satellite | In English | → Military engineering → Spaceflight engineering, astronautics |
| DSCS | Defense Support Communication Satellite | In English | → Military engineering → Spaceflight engineering, astronautics |
| DSCS | Defense Satellite Communications System | In English | → Military engineering → Spaceflight engineering, astronautics |
| DSD | Defensive Shields Demonstration | In English | → Military engineering |
| DSE | Distributed Systems Engineering | In English | → Serial publications, periodicals |
| DSEA | Data Storage Electronics Assembly | In English | → Data → Electronics |
| DSIF | Deep-Space Instrumentation Facility | In English | → Spaceflight engineering, astronautics |
| DSIFE | Deep-Space Instrumentation Facility Equipment | In English | → Spaceflight engineering, astronautics |
| DSIN | Direction de la Sûreté des Installations Nucléaires | In French | → Nuclear technology |
| DSN | Deep-Space Network | In English | → Spaceflight engineering, astronautics |
| DSP | Digital Signal Processor | In English | → Electronics |
| DSRMC | Defense Systems Review Military Communications | In English | → Serial publications, periodicals → 355 → Military engineering |
| DSS | Deep-Space Station | In English | → Spaceflight engineering, astronautics |
| DSS | Deep Space Station | In English | → Astronomy → Spaceflight engineering, astronautics |
| DSSC | Deep Space Station Complex | In English | → Astronomy → Spaceflight engineering, astronautics |
| DT | Diretoria Técnica | In Portuguese | |
| DT&E | Development, Test, and Evaluation | In English | |
| DTA | Diplôme de Technologie Approfondie | In French | → Specialized or (poly)technical colleges |
| DTAT | Direction Technique des Armements Terrestres | In French | → Military engineering |
| DTC | Direct Torque Control | In English | → Electrical engineering |
| DTC | Division Téléconduite des Réseaux | In French | → Energy economics → Electrical engineering |
| DTCA | Direction Technique des Constructions Aéronautiques | In French | → Aeronautics, aircraft |
| DTCN | Direction Technique des Constructions Navales | In French | → Vehicle engineering |
| DTIC | Defense Technical Information Center | In English | → Military engineering |
| DTR | Draft Technical Report | In English | |
| DTS | Defensive Technologies Study | In English | → Military engineering |
| DTS | Defense Technology Study | In English | → Military engineering |
| DTST | Defense Technology Study Team | In English | → Military engineering |
| DTST | Defensive Technologies Study Team | In English | → Military engineering |
| DTTP | Domestic Technology Transfer Program | In English | → Industrial property |
| DTV | Developmental Test Vehicle | In English | → Vehicle engineering |
| DTV&I | Development, Test, Verification, and Integration | In English | → Quality management |
| DUETI | Diplôme d'Université d'Études Technologiques Internationales | In French | → Higher education, universities |
| DUT | Diplôme Universitaire de Technologie | In French | → Higher education, universities |
| DUT | Device Under Test | In English | → Electronics |
| DUTA | Diplôme Universitaire de Technologie Approfondie | In French | → Higher education, universities |
| DVB-S | Digital Video Broadcasting - Satellite | In English | → Spaceflight engineering, astronautics → Telecommunications |
| DVGW | Deutsche Vereinigung des Gas- und Wasserfaches (www.dvgw.de) | In German | → Organizations and associations → Energy economics → Environmental technology, water supply, waste management |
| DvI | Dynamisering van Innovatie | In Dutch | |
| DVL | Deutsche Versuchsanstalt für Luftfahrt | In German | → Aerodynamics → Aeronautics, aircraft |
| DVM | Digital Voltmeter | In English | → Electrical engineering |
| DWR | Dienst Waterbeheer en Riolering | In Dutch | → Environmental technology, water supply, waste management |
| DWR | Druckwasserreaktor = PWR | Pressurized Water Reactor | In English = REP | Réacteur à Eau Pressurisée | In French |
In German | → Nuclear technology |
| DWS | Disaster Warning Satellite | In English | → Spaceflight engineering, astronautics |
| E&D | Engineering and Development | In English | |
| E&DSG | Electro-Optical and Data Systems Group | In English | → Data → Electrical engineering |
| E&E | Elektromashinostroenie i Elektrooborudovanie | In Russian | → Serial publications, periodicals → Mechanical engineering |
| E&M | Elektrotechnik und Maschinenbau | In German | → Serial publications, periodicals → Mechanical engineering |
| E&M | Electrical and Mechanical | In English | → Mechanical engineering → Electrical engineering |
| E&O | Engineering and Operations | In English | |
| E2A | EnergieEffizienzAgentur Rhein-Neckar-Dreick | In German | → Energy economics |
| E3A | ENSAM, ESTP, ÉCRIN, Archimède | In French | → Specialized or (poly)technical colleges |
| E4A | ENSAIS, ENSAM, ESTP, ÉCRIN, Archimède | In French | → Specialized or (poly)technical colleges |
| EA | Electronics Assembly | In English | → Electronics |
| EACEM | European Association of Consumer Electronics Manufacturers | In English | → Associations → Electronics |
| EAF | Engineering Analysis Function | In English | |
| EAF | Engineering Analysis Facility | In English | |
| EAI | Electronics Associates, Incorporated | In English | → Electronics |
| EALA | European Air Law Association | In English | → Associations → Law, jurisprudence → Aeronautics, aircraft → 65 |
| EAM | Electrical Accounting Machine | In English | → Electrical engineering |
| EANA | Energia Atomikoaren Nazioarteko Agentzia (www.iaea.org) = IAAE | Internacia Agentejo pri Atom-Energio | In Esperanto = IAEA | International Atomic Energy Agency | In English = AIEA | Agence Internationale de l'Énergie Atomique | In French = AIEA | Agenţia Internaţională pentru Energie Atomică | In Romanian = МААЕ | Международна агенция за атомна енергия | In Bulgarian = AIEA | Agència Internacional de l'Energia Atòmica | In Catalan = MAAE | Mezinárodní agentura pro atomovou energii | In Czech = IAEA | Det Internationale Atomenergiagentur | In Danish = IAEO | Internationale Atomenergieorganisation | In German = OIEA | Organismo Internacional de Energía Atómica | In Spanish = סבא"א | הסוכנות הבינלאומית לאנרגיה אטומית | In Hebrew = IAEA | International Atomenergie Agence | In Letzeburgesh = AIEA | Agenzia Internazionale per l'Energia Atomica | In Italian = IAEA | अंतर्राष्ट्रीय परमाणु ऊर्जा अधिकरण | In Hindi = MAAE | Меѓународна агенција за атомска енергија | In Macedonian = МАГАТЭ | Международное агентство по атомной энергии | In Russian = AIEA | Agência Internacional de Energia Atómica | In Portuguese = MAEA | Międzynarodowa Agencja Energii Atomowej | In Polish = МАГАТЕ | Міжнародне агентство з атомної енергії | In Ukrainian = UAEA | Uluslararası Atom Enerji Ajansı | In Turkish = IAEA | สำนักงานพลังงานปรมาณูระหว่างประเทศ | In Thai |
In Basque | → International relations → Energy economics → Nuclear technology |
| EAPB | Europos anglių ir plieno bendrija = EKSF | Europæiske Kul- og Stålfællesskab | In Danish = ESUO | Evropské společenství uhlí a oceli | In Czech = EZUČ | Europska zajednica za ugljen i čelik | In Croatian = CECA | Comunidad Europea del Carbón y del Acero | In Spanish = CECA | Communauté Européenne du Charbon et de l'Acier | In French = EGKS | Europese Gemêenschap voo Kooln en Stoal | In Vlaams = ECSC | European Coal and Steel Community | In English = ЕОВС | Европейската общност за въглища и стомана | In Bulgarian = CECA | Comunitat Europea del Carbó i de l'Acer | In Catalan = EGKS | Europäische Gemeinschaft für Kohle und Stahl | In German = CECA | Comunidade Europea do Carbón e do Aceiro | In Galician = CECA | Comunità Europea del Carbone e dell'Acciaio | In Italian = EWWiS | Europejska Wspólnota Węgla i Stali | In Polish = CECA | Comunautat Europèa del Carbon e de l'Acièr | In Occitan = EKSF | Det europeiske kull- og stålfellesskap | In Norwegian = EGKS | Europese Gemeenschap voor Kolen en Staal | In Dutch = ESZAK | Európai Szén- és Acélközösség | In Hungarian = CECA | Comunidade Europeia do Carvão e do Aço | In Portuguese = CECO | Comunitatea Europeană a Cărbunelui şi Oţelului | In Romanian = ЕОУС | Европейское объединение угля и стали | In Russian = ESUO | Európske spoločenstvo pre uhlie a ocel | In Slovak = EHYT | Euroopan hiili- ja teräsyhteisö | In Finnish = EKSG | Europeiska kol- och stålgemenskapen | In Swedish |
In Lithuanian | → International relations → International economic cooperation → Mining → Metallurgy |
| EAR | Engineering Action Request | In English | |
| EAR | Engineering Analysis Report | In English | |
| EARTO | European Association of Research and Technology Organisations | In English | → Research policy → Associations |
| EAS | Engine Actuation System | In English | → Mechanical engineering |
| EAS | Equivalent Airspeed | In English | → Aeronautics, aircraft |
| EAS | Energy Action Scotland | In English | → Energy economics |
| EASA | European Aviation Safety Agency | In English | → Organizations and associations → Aeronautics, aircraft → Transport and postal services |
| EASA | Electricidad Argentina SA | In Spanish | → Electrical engineering |
| EATR | Extravehicular Assist Teleoperator Robot | In English | → Spaceflight engineering, astronautics |
| EAZ | Energie Agentschap Zoetermeer | In Dutch | → Energy economics |
| EBA | Estonian Biomass Association | In English | → Energy economics |
| EC | Engine Control | In English | → Mechanical engineering → Vehicle engineering |
| EC | Engine Cutoff | In English | → Mechanical engineering → Vehicle engineering |
| ECA | Electronic Computer Assembly | In English | → Computer science → Electronics |
| ECA | Engine Control Assembly | In English | → Vehicle engineering |
| ECA | Electronic Control Assembly | In English | → Electronics |
| ECAC | European Civil Aviation Conference | In English | → Organizations and associations → Aeronautics, aircraft → Transport and postal services |
| ECATA | European Consortium for Advanced Training in Aerospace | In English | → Education → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| ECB | Energy Centre Bratislava | In English | → Energy economics |
| ECCAP | Electromagnetic Compatibility Circuit Analysis Program | In English | → Electronics |
| ECCAP | Electromagnetic Compatibility Computer Analysis Proposal | In English | → Computer science → Electronics |
| ECD | Energy Citations Database | In English | → Bibliography → Energy economics |
| ECI | European Copper Institute | In English | → Electrical engineering → Metallurgy |
| ECIA | Engineering Construction Industry Association (www.ecia.co.uk) | In English | → Organizations and associations → Civil engineering → Building |
| ECK | Elektrociepłownia Kraków | In Polish | → Electrical engineering |
| ECL | Electronic Circuit Logic | In English | → Computer science → Electronics |
| ECL | École Centrale de Lyon | In French | → Specialized or (poly)technical colleges |
| ECL | École Centrale de Lille | In French | → Specialized or (poly)technical colleges |
| ECLRv | Electrical Communication Laboratories Review | In English | → Serial publications, periodicals → Electrical engineering → Telecommunications |
| ECM | Energy Conversion Management | In English | → Serial publications, periodicals → Energy economics |
| ECM | Engineering Change Management | In English | |
| ECN | Engineering Change Notice | In English | |
| ECN | Energieonderzoek Centrum Nederland | In Dutch | → Energy economics |
| ECN | Energy Research Centre of the Netherlands | In English | → Energy economics |
| ECN | École Centrale de Nantes | In French | → Specialized or (poly)technical colleges |
| ECO | Engineering Change Order | In English | |
| ECO | Engine Combustion | In English | → Vehicle engineering |
| ECO | Engine Cutoff | In English | → Vehicle engineering |
| ECP | Engineering Control Program | In English | |
| ECP | École Centrale de Paris | In French | → Specialized or (poly)technical colleges |
| ECPM | École européenne de Chimie, Polymères et Matériaux de Strasbourg | In French | → Specialized or (poly)technical colleges → Chemistry → Chemical technology → 620 |
| ECQAC | Electronic Components Quality Assurance Committee | In English | → Organizations and associations → Quality management → Electronics |
| ECR | Engineering Change Request | In English | |
| ECRA | Engineering Change Request Authorization | In English | |
| ECRIN | Association Échange et Coordination Recherche INdustrie | In French | → Research policy → Associations |
| ECRIN | Épreuves Communes de Recrutement pour écoles d'INgénieurs | In French | → Specialized or (poly)technical colleges |
| ECS | Engine Control System | In English | → Vehicle engineering |
| ECS | Electrical Control Station | In English | → Electrical engineering |
| ECSC | European Coal and Steel Community = EAPB, EKSF, ESUO, EZUČ, CECA, EGKS, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG (look above) |
In English | → International relations → International economic cooperation → Mining → Metallurgy |
| ECSC | Energy Conservation and Solar Centre | In English | → Energy economics |
| ECSR | Environmental Coordination Services & Recycling | In English | → Environmental technology, water supply, waste management |
| ECSS | European Cooperation for Space Standardization | In English | → Standardization → Astronomy → Spaceflight engineering, astronautics |
| ECTEL | European Telecommunications and Professional Electronics Industry | In English | → Electronics → Telecommunications |
| ECU | Electrical Conversion Unit | In English | → Electrical engineering |
| ECU | Electronic Coupling Unit | In English | → Electronics |
| ECU | Electrical Control Unit | In English | → Electrical engineering |
| ECU | Engine Control Unit | In English | → Vehicle engineering |
| ECURIE | European Community Urgent Radiological Information Exchange | In English | → Nuclear technology |
| ECW | Elektrociepłownie Wybrzeże SA (www.ecwybrzeze.pl) | In Polish | → Electrical engineering |
| ED | Engineering DIrectorate | In English | |
| ED | Engineering Directive | In English | |
| ED | Engineering Division | In English | |
| EDA | Electronic Display Assembly | In English | → Human-computer interaction → Electronics |
| EDC | Engineering Data Center | In English | → Knowledge management |
| EDC | Engineering Design Change | In English | |
| EDCC | Engineering Drawing Control Center | In English | |
| EDCP | Engineering Design Change Proposal | In English |