| Acronym | Definition |
|---|
| ETS | Educational Testing Service (nonprofit private educational testing and measurement organization) |
| ETS | Emergency Telecommunications Service |
| ETS | Electronic Trading System |
| ETS | Emissions Trading Scheme (UK) |
| ETS | Environmental Tobacco Smoke |
| ETS | Engineering (&) Technical Services |
| ETS | Educational Talent Search |
| ETS | EIB (European Installation Bus) Tools Software |
| ETS | Electronic Text Services |
| ETS | Educational Technology Services |
| ETS | Edmonton Transit System (Edmonton, Canada) |
| ETS | École de Technologie Supérieure |
| ETS | Enfermedades de Transmisión Sexual (Spanish: Sexually Transmitted Diseases, aka: STD) |
| ETS | Electric Thermal Storage (heating system) |
| ETS | Essentially the Same |
| ETS | Eye of the Storm (gaming, World of Warcraft) |
| ETS | Evangelical Theological Society |
| ETS | Engineering Test Satellite |
| ETS | Endoscopic Thoracic Sympathectomy (surgical procedure) |
| ETS | European Treaty Series |
| ETS | Econometric Time Series |
| ETS | Euro Truck Simulator (video game) |
| ETS | Electronic Traction System |
| ETS | European Trading Scheme |
| ETS | European Telecommunication Standard |
| ETS | Expiration Term of Service |
| ETS | Episodic Tremor and Slip |
| ETS | European Test Symposium |
| ETS | Equivalent Time Sampling |
| ETS | Enhanced Traction System |
| ETS | Electronic Tendering System |
| ETS | Education and Training System |
| ETS | Executable Test Suite |
| ETS | Estimated Time of Sailing (shipping) |
| ETS | Estimated Time of Separation |
| ETS | Energy Transfer System |
| ETS | Emissions Tracking System |
| ETS | End Term of Service |
| ETS | Enthought Tool Suite |
| ETS | emergency trip system |
| ETS | Emergency Temporary Standards |
| ETS | Endotracheal Suctioning (pulmonary health) |
| ETS | Electronic Tandem Switching |
| ETS | European Telephone System |
| ETS | Experimental Test Site (White Sands Missile Range, Socorro, NM) |
| ETS | Embedded Tool Suite |
| ETS | Emergency Treatment Services |
| ETS | Electric Train Supply |
| ETS | Electronic Translator System |
| ETS | Electron Transfer System |
| ETS | Engine Temperature Sensor |
| ETS | EOSDIS Test System |
| ETS | Escondido Tutorial Service |
| ETS | Extra Terrestrial Spacecraft |
| ETS | Electronic and Traditional Dictionaries |
| ETS | Emergency Towing Systems |
| ETS | English Textual Studies (course) |
| ETS | Electric Train Staff |
| ETS | Electronic Transaction System |
| ETS | End of Time in Service |
| ETS | Electronic Timekeeping System |
| ETS | End Tour of Service |
| ETS | Enhanced Transport Service |
| ETS | Edinburg Theological Seminary (Edinburg, TX) |
| ETS | Extramural Tracking System |
| ETS | External Technology Solutions (IT Solutions) |
| ETS | Evaporator Tank System (alternate name for the HLLWE) |
| ETS | Electronic Title System |
| ETS | Estimated Time of Shipping |
| ETS | Entertainment Transportation Specialists |
| ETS | Equinox Transition Study |
| ETS | Electronic Test Set |
| ETS | European Telephone Standard |
| ETS | Embedded Training Simulation |
| ETS | European Troop Strength |
| ETS | Exploitation Technology Symposium |
| ETS | Electronic Telephone Set |
| ETS | Employee Timekeeping System |
| ETS | Expressed Tagged Site |
| ETS | Emergency Throttle System |
| ETS | Engineering Technical/Test System |
| ETS | External Telecommunication Service |
| ETS | Extended Tank System |
| ETS | Engine Tracking System (aviation) |
| ETS | Event Tree Sequence |
| ETS | Enhanced Transport Session |
| ETS | Enron Technical Services |
| ETS | Electronic Test Station |
| ETS | Engineered Time Standard |
| ETS | Enlisted Training Strategy |
| ETS | Extreme Transformation System (supplement) |
| ETS | Entertainment Television Services, Inc. (Beverly Hills, CA) |
| ETS | Extreme Training Support |
| ETS | E-Gov Travel Service |
| ETS | Enterprise Technical Support (various organizations) |
| ETS | Enemy Territory Statistics (gaming; Wolfenstein) |
| ETS | Éducateur Technique Spécialisé (French: Specialized Technical Educator) |
| ETS | Educational Technology Support (various organizations) |