| Acronym | Definition |
|---|
| EU | European Union |
| EU | European Union (top level domain) |
| EU | End User |
| EU | Energy Usage |
| EU | Expanded Universe (series of novels and comic books) |
| EU | Etats-Unis (French: United States) |
| EU | Emory University (Atlanta, Georgia) |
| EU | Estados Unidos (Spanish: United States) |
| EU | Europese Unie (Dutch: European Union) |
| EU | Europäische Union (German: European Union) |
| EU | Enriched Uranium |
| EU | Evropská Unie (Czech: Europian Union) |
| EU | Eastern University (St Davids, Pennsylvania) |
| EU | Europium |
| EU | Emergency Unit (Hong Kong) |
| EU | Elon University (North Carolina) |
| EU | Euroopan Unioni (Finnish: European Union) |
| EU | Engineering Unit |
| EU | Edinburgh University (UK) |
| EU | Elite Unit |
| EU | Entropia Universe (website) |
| EU | Evangel University |
| EU | Experimental Unit |
| EU | Electrical Utilities |
| EU | Erholungsurlaub (German) |
| EU | Ecko Unlimited |
| EU | Energy Utilization |
| EU | Equivalent Units |
| EU | Ege University |
| EU | Exelon Utilities (various locations) |
| EU | Execution Unit (computer engineering) |
| EU | External Unit |
| EU | Eigenhändige Unterschrift (German: Personal Signature) |
| EU | Electronics Unit |
| EU | Edit, Undo |
| EU | Extended Universe |
| EU | Endotoxin Unit |
| EU | Electronic Underground (gaming site) |
| EU | Evangelical Union |
| EU | Emisoras Unidas (de Guatemala; radio station) |
| EU | Explosives Unit (US FBI Bomb Data Center) |
| EU | Events Unlimited (UK) |
| EU | Expander Unit |
| EU | Ehrlich Unit (urobilinogen measurement) |
| EU | Ecuatoriana de Aviacion, SA (airline code) |
| EU | Emmissions Unit (environmental operating permits) |
| EU | Eustice Australian Air Mail Catalog (philately) |