| ECTA | Early Career Teaching Academy 
| Others |
| ECTA | East Career and Technical Academy
| Others |
| ECTA | East Coast Timing Association
| Others |
| ECTA | East Coast Trail Association (Newfoundland and Labrador, Canada)
| Others |
| ECTA | Electronic Cigarette Trade Association
| Others |
| ECTA | Elora Cataract Trailway Association (Ontario, Canada)
| Others |
| ECTA | Emissions Control Technology Association
| Others |
| ECTA | Enzyme catalyzed therapeutic agent
| Others |
| ECTA | Essex County Trail Association
| Others |
| ECTA | European Chemical Transport Association
| Others |
| ECTA | European Competitive Telecommunication Association
| Others |
| ECTA | European Competitive Telecommunications Association
| Others |
| ECTA | European Core and Tube Association
| Others |
| ECTA | European Cutting Tools Association
| Others |
| ECTA | Executive Counselling and Training Academy
| Others |