| Abbreviation | Definition |
|---|---|
| ESSA | Exercise Science Students Association |
| ESSB | Earth Systems Science Building |
| ESSCO | Engineering Students Societies' Council of Ontario |
| ESSI | École Supérieure En Sciences Informatiques |
| ESSI | Exercise and Sport Science Initiative |
| ESSU | Eastern Samar State University |
| EST | English for Science Technology |
| EST | English for Science & Technology |
| ESTB | Engineering Skills Training Board |
| ESTD | Engineering Science and Technology Division |
| ESTF | Ecole Supérieure de Technologie de Fès (Morocco) |
| ESTI | Emergency Services Training Institute |
| ESTIR | Electrochemical Science and Technology Information Resource |
| ESU | East Stroudsburg University |
| ESU | Emporia State University |
| ESU | Enormous State University |
| ESU | European Summer University |
| ET | Education Technology |
| ET | Environmental Technology |
| ET | Extra Time |