| Acronym | Meaning |
| ETC | Electronic Toll Collection |
| ETC | Estimated Time of Completion |
| ETC | Chief Electronics Technician (Naval Rating) |
| ETC | Eastern Transportation Corridor (California) |
| ETC | Echo Tracker Classifier |
| ETC | Education and Training Committee (various organizations) |
| ETC | Efficient Transportation for the Community (Florida) |
| ETC | Embedded Training Capability |
| ETC | Energy Training Complex |
| ETC | Engineering Technical Code |
| ETC | Engineering Topographic Command |
| ETC | Enhanced Terminal Capability |
| ETC | Environmental Technology Centre (Canadian government agency) |
| ETC | Environmental Technology Council |
| ETC | Equal Treatment Commission (various locations) |
| ETC | Estimate To Complete (Cost) |
| ETC | Estimated Time of Commencement |
| ETC | Estimated Total Cost |
| ETC | Estonian Trade Council (est. 1991) |
| ETC | European Transportation Carrier (European Space Agency) |
| ETC | Exportable Training Capability (US DoD) |
| ETC | Exportable Training Center |