| Abbreviation | Definition |
|---|---|
| DWU | Dairy Workers Union |
| DWU | Domestic Workers Union |
| E | Elect |
| EACU | East Anglian Chess Union |
| EACU | Ely Area Credit Union |
| EACU | Emory Alliance Credit Union |
| EACU | Eurasian Customs Union |
| EAEU | Eurasia Economic Union |
| EAMU | East African Monetary Union |
| EBCU | European Beer Consumers' Union |
| EBU | English Bridge Union |
| EBU | European Broadcaster Union |
| EBU | European Brodcasting Union |
| ECA | Employee Collective Agreement |
| ECCI | Edinburgh Centre for Carbon Innovation |
| ECCU | Eastern Caribbean Currency Union |
| ECCU | Energy Capital Credit Union |
| ECRU | Eastern Counties Rugby Union |
| ECSU | Emmanuel College Students' Union |
| ECU | Earthmover Credit Union |