| Abbreviation | Definition |
|---|---|
| ESTA | Escape System Test Article |
| ESTEC | European Research and Technology Center |
| ESTEC | European Space Research and TEChnology Center |
| ESTL | Electronic Systems Test Laboratory |
| ESTO | Earth Science Technology Office |
| ESTRACK | Space Tracking |
| ESV | Earth Satellite Vehicle |
| ESV | Emergency Shutoff Valve |
| ESV | Experimental Safety Vehicle |
| ESVS | Escape Suit Ventilation System |
| ESW | Engine Status Word |
| ET | Edge Thickness |
| ET | Elapsed Time |
| ET | Elevated Temperature |
| ET | Event Timer |
| ET | External Tank |
| ETA | Empty Tank Alert |
| ETA | Environmental Test Article |
| ETA | Estimated Time to Acquisition |
| ETA | Explosive Transfer Assembly |