| Acronym | Definition |
|---|
| ETT | Emergency Trauma Technician (Alaska) |
| ETT | Empresa de Trabajo Temporal (Spain) |
| ETT | European Transactions on Telecommunications |
| ETT | Embedded Training Team |
| ETT | Exercise Tolerance Test (cardiology) |
| ETT | Exercise Treadmill Test |
| ETT | Employment Training Tax (California) |
| ETT | English Toy Terrier (dog breed) |
| ETT | Electric Transmission Texas, LLC (Austin, TX) |
| ETT | Endo Tracheal Tube |
| ETT | Expected Transmission Time |
| ETT | Employee Timetable |
| ETT | Education Technology and Training (IEEE Workshop) |
| ETT | Engineering Training Team |
| ETT | Evacuated Tube Transport |
| ETT | Estimated Travel Time |
| ETT | Extra Travel Tunnel (Arctic Cat snowmobiles) |
| ETT | Educational Telecommunications and Technology |
| ETT | European Transactions on Communications (IEEE Communications Society) |
| ETT | Epitheloid Trophoblastic Tumor |
| ETT | Effluent Toxicity Testing |
| ETT | Environmental Training & Transfer GmbH |
| ETT | EKMS Transition Team |
| ETT | Environmental Technology Team |
| ETT | Expected Test Time |
| ETT | Extract, Transformation, Transport |
| ETT | Enhanced Tradespace Tool |
| ETT | Estimated Terrestrial Transmissions (cache management algorithm) |
| ETT | Estimated Test Time |
| ETT | English Tea Time |
| eTT | Effectively Tested Dram (full specification parts, fully tested and unmarked) |
| ETT | Elevated Temperature Testing |
| ETT | European Turley Telecommunication (Europe) |
| ETT | Equity Transfer Trust (Canada) |
| ETT | Entreprise de Travail Temporaire (French: Temporary Employment Agency) |