| ECTC | Early Childhood Teacher Credential 
| Others |
| ECTC | Early Childhood Training Center
| Others |
| ECTC | Early Childhood Treatment Center
| Others |
| ECTC | East Coast Taiko Conference
| Others |
| ECTC | East Coast Town Council
| Others |
| ECTC | Eastern Collegiate Taekwondo Conference
| Others |
| ECTC | Eastern Connecticut Transportation Consortium
| Others |
| ECTC | Eastern Cornhusker Trapshooting Conference
| Others |
| ECTC | Eden Career Technical Center
| Others |
| ECTC | Effective Classroom Teaching Curriculum
| Others |
| ECTC | Egg Crash Test Car
| Others |
| ECTC | Electronic Components and Technology Conference
| Others |
| ECTC | Electronically Controlled Tool Cabinet
| Others |
| ECTC | Elizabethtown Community and Technical College
| Others |
| ECTC | Elmira Chemung Transportation Council
| Others |
| ECTC | Emerald Coast Technical College
| Others |
| ECTC | Emerald Coast Theatre Company
| Others |
| ECTC | Emily Cooperative Telephone Company
| Others |
| ECTC | Enhanced Color Temperature Control
| Others |
| ECTC | Erie Catt Teacher Center
| Others |
| ECTC | Erosion Control Technology Council
| Others |
| ECTC | European Counter Terrorism Centre
| Others |
| ECTC | Evolutionary Computation Technical Committee
| Others |
| ECTC | Expected Cost to Company
| Finance |
| ECTC | Expected Cost To Completion
| Others |
| ECTC | Extended Controlled Temperature Conditions
| Others |