| ETRC | East Tennessee Rail Car
| Others |
| ETRC | East Tennessee Reef Club
| Others |
| ETRC | East Tennessee Retriever Club
| Others |
| ETRC | East Texas Research Center
| Others |
| ETRC | Eastern Townships Research Centre
| Others |
| ETRC | Eastern Townships Resource Centre
| Others |
| ETRC | Educational Technology Resource
| Others |
| ETRC | Educational Technology Resource Center
| Others |
| ETRC | Electronic Text Research Center
| Others |
| ETRC | Electronics Technician (radar) Chief Petty Officer
| Others |
| ETRC | English Teaching Resource Center
| Others |
| ETRC | Equine Teaching Research Center
| Others |
| ETRC | European Truck Racing Championship
| Others |
| ETRC | European Truck Racing Cup
| Others |