| Acronym | Definition |
|---|
| EWS | Exchange Web Services (Microsoft) |
| EWS | Early Warning System |
| EWS | Ewing's Sarcoma |
| EWS | Eyes Wide Shut (Stanley Kubrick movie) |
| EWS | Embedded Web Server (HP printers that have ethernet and server capability) |
| EWS | English, Welsh and Scottish (UK railway operator) |
| EWS | Economically Weaker Section |
| EWS | Emergency Warning System |
| EWS | Environmental Waste Solutions |
| EWS | Engineering Work Station |
| EWS | Employee Written Software (IBM) |
| EWS | Expeditionary Warfare School (US Marine Corps) |
| EWS | Environmental Water Systems (est. 1987) |
| EWS | Electronic Warfare Squadron |
| EWS | Electronic Warfare Support |
| EWS | Emergency Water Supply |
| EWS | Engineered Wood Systems (trade association) |
| EWS | Early Warning Signal |
| EWS | Ethel Walker School (Simsbury, CT) |
| EWS | Emma Willard School (Troy, NY, founded in 1814) |
| EWS | Electronic Warfare Suite |
| EWS | Ethernet Wire Service |
| EWS | Emery/Weiner School (Houston, TX) |
| EWS | Extreme Wide Shot (video photography) |
| EWS | Eye Wash Station |
| EWS | Electrical Wafer Sorting (operation of electrically testing dice on a silicon wafer) |
| EWS | Engineering Watch Supervisor |
| EWS | European Webservice |
| EWS | Empty Wallet Syndrome |
| EWS | Eastern Washington State |
| EWS | Enterprise Web Service |
| EWS | Early Wet Season |
| EWS | Electronic Weighing Scale |
| EWS | Emerson, Wajdowicz Studios (design firm; New York, NY) |
| EWS | Ethanol Withdrawal Syndrome |
| EWS | East Wiltshire School (Cornwall, Prince Edward Island, Canada) |
| EWS | Ethernet Workgroup Switch |
| EWS | Executive World Services, Inc. (Braselton, GA) |
| EWS | Extended Workplace Solutions |
| EWS | Executive Wine Seminars, Inc (New York, NY) |
| EWS | Electronic Warfare Supervisor/System |
| EWS | Electronic Warfare Simulator |
| EWS | Enterprise Work Station |
| EWS | Executive Work Station |
| EWS | Engineering Worksheet |
| EWS | Egypt Web Solutions |
| EWS | Extended Workplace Service (Sprint) |
| EWS | Extended Warranty Service (product performance) |