| ENSIETA | École Nationale Supérieure des Ingénieurs des Études et Techniques d'Armement | In French | → Specialized or (poly)technical colleges → Military engineering |
| ENSIL | École Nationale Supérieure d'Ingénieurs de Lomé | In French | → Specialized or (poly)technical colleges |
| ENSLL | École Nationale Supérieure Louis Lumière | In French | → Higher education, universities → Cinema, movies |
| ENSMA | École Nationale Supérieure de Mécanique et d'Aérotechnique (www.ensma.fr) | In French | → Specialized or (poly)technical colleges → Mechanical engineering → Aeronautics, aircraft → Vehicle engineering |
| ENSMM | École Nationale Supérieure de Mécanique et des Microtechniques | In French | → Specialized or (poly)technical colleges → Mechanical engineering |
| ENSO | Energie Sachsen Ost GmbH (www.enso.de) | In German | → Energy economics |
| ENSPY | École Nationale Supérieure Polytechnique de Yaoundé | In French | → Specialized or (poly)technical colleges |
| ENSSAT | École Nationale Supérieure des Sciences Appliquées et de Technologies | In French | → Specialized or (poly)technical colleges |
| EnST | Environmental Science Technology | In English | → Serial publications, periodicals → Environment, environmental sciences |
| ENSTA | École Nationale Supérieure des Techniques Avancées | In French | → Specialized or (poly)technical colleges |
| ENSTPE | École Nationale Supérieure des Travaux Publics de Yaoundé | In French | → Specialized or (poly)technical colleges → Civil engineering |
| ENSTPO | École Nationale Supérieure des Travaux Publics de Yamoussoukro | In French | → Specialized or (poly)technical colleges → Civil engineering |
| ENSUT | École Nationale Supérieure de Technologie | In French | → Specialized or (poly)technical colleges |
| ENTPA | École Nationale des Travaux Publics d'Alger | In French | → Specialized or (poly)technical colleges → Civil engineering |
| ENTPE | École Nationale des Travaux Publics de l'État | In French | → Specialized or (poly)technical colleges → Civil engineering → Building |
| ENTPJ | École Nationale de Formation de Techniciens Supérieurs des Travaux Publics de Jijel | In French | → Specialized or (poly)technical colleges → Civil engineering |
| ENTPN | École Nationale des Travaux Publics de N'jamena | In French | → Specialized or (poly)technical colleges → Civil engineering |
| EnTR | Energy Technology Review | In English | → Serial publications, periodicals → Energy economics |
| ENTS | École Nationale des Techniciens Supérieurs | In French | → Specialized or (poly)technical colleges |
| Env | Environmentrics | In English | → Serial publications, periodicals → Environment, environmental sciences |
| ENVISAT | Environmental Satellite | In English | → Environment, environmental sciences → Spaceflight engineering, astronautics |
| EOAST | Earth-Oriented Applications and Space Technology | In English | → Serial publications, periodicals → Earth sciences → Spaceflight engineering, astronautics |
| EOC | Engine-Out Capability | In English | → Vehicle engineering |
| EOC | Engine Order Capability | In English | → Vehicle engineering |
| EOCR | Engineering Order Control Record | In English | |
| EODRS | Earth Observation Data Retrieval System | In English | → Earth sciences → Spaceflight engineering, astronautics |
| EOHT | External Oxygen and Hydrogen Tank | In English | → Spaceflight engineering, astronautics |
| EOI | Earth Orbit Insertion | In English | → Spaceflight engineering, astronautics |
| EOL | Earth Orbit Launch | In English | → Spaceflight engineering, astronautics |
| EOM | Equation Of Motion | In English | → Physics → Mechanical engineering |
| EOM | Engineering Operations Manual | In English | |
| EOM | Earth Orbital Mission | In English | → Spaceflight engineering, astronautics |
| EOPF | End of Powered Flight | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| EORSAT | Electronic Ocean Reconstruction Satellite | In English | → Marine research, oceanography → Spaceflight engineering, astronautics |
| EOS | Earth Observation Satellite | In English | → Spaceflight engineering, astronautics |
| EOS | Earth-Orbit Shuttle | In English | → Spaceflight engineering, astronautics |
| EOSD | Electro-Optical Systems Design | In English | → Serial publications, periodicals → Electrical engineering |
| EOSS | Extravehicular Activity Operational Slide-Wire System | In English | → Spaceflight engineering, astronautics |
| EOSS | Earth-Orbital Space Station | In English | → Spaceflight engineering, astronautics |
| EP | Electrical Power | In English | → Electrical engineering |
| EP | Éclairage Public | In French | → Electrical engineering → Environmental technology, water supply, waste management |
| EPA | EnergiePrestatieAdvies | In Dutch | → Energy economics |
| EPA | Engineering Personnel Authorization | In English | |
| EPA | Engineering Project Authorization | In English | |
| EPA | Elektronikus Periodika Archívum és Adatbázis | In Hungarian | → Electronics |
| EPC | Electronic Product Code | In English | → Electronics |
| EPC | External Power Contractor | In English | → Electrical engineering |
| EPC | Electronic Parts Control | In English | → Electronics |
| EPCDC | Electrical Power Conditioning, Distribution, and Control | In English | → Electrical engineering |
| EPD | Electrical Power Distribution | In English | → Electrical engineering |
| EPDB | Experiment Power Distribution Box | In English | → Electrical engineering |
| EPDC | Electrical Power Distribution and Control | In English | → Electrical engineering |
| EPDCS | Electrical Power Distribution and Control Subsystem | In English | → Electrical engineering |
| EPDS | Electrical Power Distribution System | In English | → Electrical engineering |
| EPDU | Electrical Power Distribution Unit | In English | → Electrical engineering |
| EPE | Étude de Planification Énergétique | In French | → Energy economics |
| EPG | Electrical Power Generator | In English | → Electrical engineering |
| EPGCS | Electrical Power Generation and Control Subsystem | In English | → Electrical engineering |
| EPGS | Electrical Power Generation Subsystem | In English | → Electrical engineering |
| EPIA | European Photovoltaic Industry Association | In English | → Associations → Energy economics → Electrical engineering |
| EPICEA | Entreprise de Promotion de l'Innovation au Commissariat à l'Énergie Atomique | In French | → Nuclear technology |
| EPL | Electronic, Electrical, and Electromechanical Parts List | In English | → Electrical engineering |
| EPL | Electrical Power Level | In English | → Electrical engineering |
| EPLD | Electrically Erasable Programmable Logic Device | In English | → Hardware → Electronics |
| EPM | École Polytechnique de Masuku | In French | → Specialized or (poly)technical colleges |
| EPM | Engineering Project Manager | In English | |
| EPMS | Engineering Performance Management System | In English | |
| EPN | Escuela Politécnica Nacional | In Spanish | → Specialized or (poly)technical colleges |
| EPOC | External Payload Operations Center | In English | → Spaceflight engineering, astronautics |
| EPOSS | European Technology Platform on Smart Systems Integration (www.smart-systems-integration.org) | In English | → Organizations and associations → Electronics |
| EPP | European Passive Plant | In English | → Nuclear technology |
| EPPSS | Electrical Power/Pyro Sequential System | In English | → Electrical engineering |
| EPR | Engine Pressure Ratio | In English | |
| EPR | Engineering Purchase Request | In English | → 34745 |
| EPR | European Pressurized Reactor | In English | → Nuclear technology |
| EPRI | Electric Power Research Institute (www.epri.com) | In English | → Research institutes → Electrical engineering |
| EPS | Electrical Power System | In English | → Electrical engineering |
| EPS | Experimental Power Supply | In English | → Electrical engineering |
| EPS | Emergency Power System | In English | → Electrical engineering |
| EPSIEL | École Polyvalente Supérieure d'Informatique et d'Électronique (www.epsiel.net) | In French | → Specialized or (poly)technical colleges → Computer science → Electronics |
| EPSMA | European Power Supply Manufacturers Association | In English | → Organizations and associations → Energy economics → Electrical engineering |
| EPSP | Experiment Power Switching Panel | In English | → Electrical engineering |
| EPSRC | Engineering and Physical Sciences Research Council | In English | → Physics |
| EPST | Établissement Public à caractère Scientifique et Technologique | In French | → Public administration, government → Mathematics and natural sciences |
| EPST | Établissement Public (à caractère) Scientifique et Technologique | In French | → Mathematics and natural sciences |
| EPSTF | Electrical Power System Test Facility | In English | → Electrical engineering |
| EPTA | European Power Tool Association | In English | → Organizations and associations → Energy economics |
| EPTS | École Polytechnique de Thiès | In French | → Specialized or (poly)technical colleges |
| EPY | Electronic Control Assembly Pitch And Yaw | In English | → Electronics |
| ER | Électrification Rurale | In French | → Electrical engineering |
| ERA | Electrical Replaceable Assembly | In English | → Electrical engineering |
| ERAC | European Rail Research Advisory Council | In English | → Organizations and associations → Rail transport engineering → Transport and postal services |
| ERAP | Earth Resources Aircraft Program | In English | → Aeronautics, aircraft → Earth sciences |
| ERAP | Entreprise de Recherches et d'Activités Pétrolières | In French | → Mining → 665 |
| ERB | Engineering Review Board | In English | |
| ERBM | Extended-Range Ballistic Missile | In English | → Military engineering |
| ERBS | Earth Radiation Budget Satellite | In English | → Spaceflight engineering, astronautics → Astronomy |
| ERCM | Engineering Requirements and Change Management | In English | |
| EREA | Établissements de Recherche Européens de l'Aéronautique | In French | → Aeronautics, aircraft |
| ERG | Energy Research Group | In English | → Energy economics |
| ERINT | Exoatmospheric Reentry Vehicle Interceptor | In English | → Spaceflight engineering, astronautics |
| ERIS | Endoatmospheric Reentry Vehicle Interceptor System | In English | → Spaceflight engineering, astronautics |
| ERO | Engineering Release Operation | In English | |
| EROS | Electrical Racecar Overharzer Students | In English | → Specialized or (poly)technical colleges → Electrical engineering → Automobile manufacturing |
| EROS | Earth Resources Observations System | In English | → Earth sciences → Spaceflight engineering, astronautics |
| ERP | Elevator Reference Plane | In English | → 62073 |
| ERPA | Emission Reduction Purchase Agreement | In English | → Environmental technology, water supply, waste management |
| ERR | Engineering Release Record | In English | |
| ERR | Electrical Resistance Requirement | In English | → Electrical engineering |
| ERRI | European Railway Research Institute | In English | → Rail transport engineering → Transport and postal services |
| ERS | Engineering Release System | In English | |
| ERS | Entry and Recovery Simulation | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| ERS | Earth Resources Satellite | In English | → Earth sciences → Spaceflight engineering, astronautics |
| ERS | European Remote Sensing (Satellite) | In English | → Spaceflight engineering, astronautics |
| ERS | Environmental Research Satellite | In English | → Environment, environmental sciences → Spaceflight engineering, astronautics |
| ERSIR | Earth Resources Shuttle Imaging Radar | In English | → Earth sciences → Spaceflight engineering, astronautics |
| ERT | Équipe de Recherche Technologique | In French | |
| ERTG | Economic Radioisotope Thermoelectric Generator | In English | → Energy economics → Nuclear technology → Electrical engineering |
| ERTRAC | European Road Transport Research Advisory Council (www.ertrac.org) | In English | → Organizations and associations → Vehicle engineering → Transport and postal services |
| ERTS | Earth Resources Technology Satellite | In English | → Earth sciences → Spaceflight engineering, astronautics |
| ERU | Emission Reduction Unit | In English | → Environmental technology, water supply, waste management |
| ERV | Experimental Reentry Vehicle | In English | → Spaceflight engineering, astronautics |
| ES | Engineering Specification | In English | |
| ESA | Engineering System Assembly | In English | |
| ESA | Engineering Support Area | In English | |
| ESA | Engineering Supply Area | In English | |
| ESA | European Space Agency | In English | → Astronomy → Spaceflight engineering, astronautics |
| ESABu | European Space Agency Bulletin | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| ESAJ | European Space Agency Journal | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| ESAST | European Space Agency Scientific Technical Review | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| ESBC | European Shareholders of Bougainville Copper (www.bougainville-copper.eu) | In German | → Organizations and associations → Financial markets → Mining |
| ESBWR | Economic Simplified Boiling Water Reactor | In English | → Nuclear technology |
| ESCS | Electronic Spacecraft Simulator | In English | → Computer simulation → Spaceflight engineering, astronautics |
| ESD | Electronic(s) Systems Division | In English | → Electronics |
| ESDAC | European Space Data Center | In English | → Astronomy → Earth sciences → Spaceflight engineering, astronautics |
| ESE | Engineering Support Equipment | In English | |
| ESE | Electronic Support Equipment | In English | → Electronics |
| ESE | Electrical Support Equipment | In English | → Electrical engineering |
| ESE | École Supérieure d’Électricité (www.supelec.fr) | In French | → Specialized or (poly)technical colleges → Electrical engineering |
| ESE | Exploitation du Système Électrique | In French | → Electrical engineering |
| ESF | Électriciens Sans Frontières | In French | → Organizations and associations → Development → Electrical engineering |
| ESFTF | École Supérieure de Formation du Transport Ferroviaire | In French | → Specialized or (poly)technical colleges → Rail transport engineering → Transport and postal services |
| ESI | Electrical System Integration | In English | → Electrical engineering |
| ESI | Erich-Schmid-Institut für Materialwissenschaft (www.oeaw.ac.at/esi/) | In German | → Research institutes → Materials science |
| ESIB | École Supérieure d'Ingénieurs de Beyrouth | In French | → Higher education, universities |
| ESIB | École Supérieure d'Ingénieurs de Beyrout | In French | → Specialized or (poly)technical colleges |
| ESIE | École Supérieure Interafricaine de l'Électricité | In French | → Specialized or (poly)technical colleges → Electrical engineering |
| ESIH | École Supérieure d'Infotronique d'Haïti | In French | → Specialized or (poly)technical colleges → Computer science → Electronics |
| ESIS | ESA Space Information Systems | In English | → Astronomy → Spaceflight engineering, astronautics |
| ESM | Electronic Support Measure | In English | → Electronics |
| ESM | Energy Storage Module | In English | → Energy economics |
| ESMC | Eastern Space and Missile Center | In English | → Military engineering → Spaceflight engineering, astronautics |
| ESMCR | Eastern Space and Missile Center Regulation | In English | → Military engineering → Spaceflight engineering, astronautics |
| ESME | École Spéciale de Mécanique et d'Électricité-Sudria | In French | → Specialized or (poly)technical colleges → Mechanical engineering → Electrical engineering |
| ESMT | European School of Management and Technology | In English | → Management → Specialized or (poly)technical colleges |
| ESOC | European Space Operations Centre | In English | → Astronomy → Spaceflight engineering, astronautics |
| ESOC | European Space Operations Center | In English | → Astronomy → Spaceflight engineering, astronautics |
| ESONE | Committee for European Studies on Norms for Electronics | In English | → Organizations and associations → Standardization → Electronics |
| ESOW | Engineering Statement Of Work | In English | |
| ESP | Engineering Simulator Program | In English | |
| ESP | Énergie et Systèmes de Propulsion | In French | → Energy economics → Vehicle engineering |
| ESP | Electronic Stability Program | In English | → Electronics |
| ESPA | École Supérieure Polytechnique d'Antananarivo | In French | → Specialized or (poly)technical colleges |
| ESPC | European Space Power Conference | In English | → Energy economics → Spaceflight engineering, astronautics |
| ESPEB | Escola Politècnica Superior d’Edificació de Barcelona (www.epseb.upc.edu) | In Spanish | → Specialized or (poly)technical colleges → Civil engineering → Building |
| ESPI | European Space Policy Institute | In English | → International relations → Astronomy → Spaceflight engineering, astronautics |
| ESPOCH | Escuela Superior Politécnica del Chimborazo | In Spanish | → Specialized or (poly)technical colleges |
| ESR | Engineering Support Request | In English | |
| ESRD | Engineering Software Research and Development | In English | → Software |
| ESRIN | European Space Research Institute | In English | → Astronomy → Earth sciences → Spaceflight engineering, astronautics |
| ESRO | European Space Research Organization | In English | → Astronomy → Earth sciences → Spaceflight engineering, astronautics |
| ESRO | European Space Research Organisation | In English | → Astronomy → Spaceflight engineering, astronautics |
| ESS | Early Space Station | In English | → Spaceflight engineering, astronautics |
| ESS | Energy Storage Subsystem | In English | → Energy economics |
| ESSA | Electrically Steerable Spherical Array | In English | → Electrical engineering |
| ESSC | Engineering Support Services Contract | In English | → 3474 |
| ESSL | Engineering and Scientific Subroutine Library | In English | → Programming languages → Mathematics and natural sciences |
| EST | Energy Saving Trust | In English | → Energy economics |
| ESTA | École Supérieure des Technologies et des Affaires | In French | → Higher education, universities → Economics |
| ESTA | École Supérieure de Technologie d'Agadir (www.esta.ac.ma) | In French | → Specialized or (poly)technical colleges |
| ESTAG | Energie Steiermark AG (www.e-steiermark.com) | In German | → Energy economics |
| ESTC | École Supérieure de Technologie de Casablanca (www.est-uh2c.ac.ma) | In French | → Specialized or (poly)technical colleges |
| ESTEC | European Space Technology Center | In English | → Spaceflight engineering, astronautics |
| ESTEC | European Space Research and Technology Centre | In English | → Astronomy → Spaceflight engineering, astronautics |
| ESTF | Electronic System Test Facility | In English | → Electronics |
| ESTIF | European Solar Thermal Industry Federation (www.estif.org) | In English | → Organizations and associations → Energy economics |
| ESTL | Electronic Systems Test Laboratory | In English | → Research institutes → Electronics |
| ESTM | École Supérieure de Technologie de Meknès (www.est-umi.ac.ma) | In French | → Specialized or (poly)technical colleges |
| ESTO | École Supérieure de Technologie d'Oujda (wwwesto.univ-oujda.ac.ma) | In French | → Specialized or (poly)technical colleges |
| ESTP | European Space Technology Platform (www.estp-space.eu) | In English | → Organizations and associations → Astronomy → Spaceflight engineering, astronautics |
| ESTP | École Spéciale des Travaux Publics | In French | → Specialized or (poly)technical colleges → Civil engineering → Building |
| ESTS | École Supérieure de Technologie de Safi (www.ests.ucam.ac.ma) | In French | → Specialized or (poly)technical colleges |
| ESTTP | Europäische Solarthermie-Technologieplattform = ESTTP | European Solar Thermal Technology Platform | In English |
In German | → Energy economics |
| ESTTP | European Solar Thermal Technology Platform = (look above) |
In English | → Energy economics |
| ESUO | Evropské společenství uhlí a oceli = EKSF | Europæiske Kul- og Stålfællesskab | In Danish = 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 = EAPB | Europos anglių ir plieno bendrija | In Lithuanian |
In Czech | → International relations → International economic cooperation → Mining → Metallurgy |
| ESUO | Európske spoločenstvo pre uhlie a ocel = EKSF, EZUČ, CECA, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Slovak | → International relations → International economic cooperation → Mining → Metallurgy |
| ESV | Energiesparverband | In German | → Organizations and associations → Energy economics |
| ESZAK | Európai Szén- és Acélközösség = ESUO, EKSF, EZUČ, CECA, EGKS, ECSC, ЕОВС, EWWiS, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Hungarian | → International relations → International economic cooperation → Mining → Metallurgy |
| ETA | Engineering Test Article | In English | |
| ETC | European Technical Codes | In English | → Standardization |
|