| Abbreviation | Definition |
|---|---|
| ESCU | Ethicon Suture Credit Union |
| ESDU | European Show Dance Union |
| ESRAB | European Security Research Advisory Board (European Union) |
| ESSU | English Smallbore Shooting Union |
| ESSU | Enterprise Systems Student Union |
| ESSU | Equity Studies Students Union |
| ESSU | Eurasia Sport Science Union |
| ESU | Emarati Students Union |
| ESU | English Slut Union |
| ESU | English Speaking Union |
| ESU | Ethiopian Student Union |
| ESU | European Seniors Union |
| ESU | European Student's Union |
| ESUJ | English Speaking Union of Japan |
| ETAI | English Teachers' Association of Israel |
| ETEU | Eastern Telecoms Employees Union |
| ETGU | Ethiopian Textile and Garment Union |
| ETTU | European Table Tennis Union |
| ETU | Electrical Trade Union |
| ETU | Electrical Trades Union |