| ETT | Edge Testing Tool 
| Others |
| ETT | Effective Teacher Training
| Others |
| ETT | Effective Termite Treatment
| Others |
| ETT | Effective Test Time
| Others |
| ETT | Electric Transmission Texas
| Others |
| ETT | Electrical Testing Technician
| Others |
| ETT | Electrical Training Trust
| Others |
| ETT | Elementary Teacher Training
| Others |
| ETT | Elementary Teachers of Toronto
| Others |
| ETT | Embedded Training Team
| Others |
| ETT | Emergency Transport Technology
| Others |
| ETT | Emergency Trauma Technician
| Others |
| ETT | Emerging Technology Team
| Others |
| ETT | Emerging Telecommunications Technologies
| Others |
| ETT | Emona Telecoms Trainer
| Others |
| ETT | Emotional Transformation Therapy
| Others |
| ETT | Emphysema Treatment Trial
| Others |
| ETT | Employment Training Tax
| Others |
| ETT | Empowering the Teachers
| Others |
| ETT | Empresa de Trabajo Temporal
| Others |
| ETT | En Trave Till
| Others |
| ETT | Endotracheal Tube
| Others |
| ETT | Enforcement Targeting Tool
| Others |
| ETT | Engineering Training Team
| Others |
| ETT | English target text
| Others |
| ETT | English Tea Time
| Others |
| ETT | English Touring Theatre
| Others |
| ETT | English Toy Terrier
| Others |
| ETT | Enhanced Tradespace Tool
| Others |
| ETT | Entertainment and Teachers Training
| Others |
| ETT | Epinephrine Tolerance Test
| Others |
| ETT | Estimated Transit Time
| Others |
| ETT | Estimated Travel Transit
| Others |
| ETT | Europe Talks Tickets
| Others |
| ETT | European Transactions on Telecommunications
| Others |
| ETT | Evacuated Tube Transport
| Others |
| ETT | Every Third Thursday
| Others |
| ETT | Example Trainer Tester
| Others |
| ETT | Exchange Traded Tracker
| Others |
| ETT | Exercise Tolerance Test
| Others |
| ETT | Exercise Tolerance Testing
| Others |
| ETT | Exercise Treadmill Test
| Others |
| ETT | Expandable Travel Trailer
| Others |
| ETT | Extended Text Table
| Others |
| ETT | Extraction Transformation and Transportation
| Others |