| Acronym | Definition |
|---|
| TCOC | Transmission Change over Protocol |
| TCOC | Total Cost of Care (healthcare) |
| TCOC | Tata Code of Conduct (Tata Ltd.) |
| TCOC | Triumph Classic Owners Club (Ireland) |
| TCOC | Tube Conducteur d'Onde de Choc (French: Driver Tube Shock Wave) |
| TCOC | Triumph Club of the Carolinas (est. 1983) |
| TCOC | Tall Club of Orange County (California) |
| TCOC | The Church of Corinth (Corinth, TX) |
| TCOC | Tele Centro Oeste Celular (Portuguese; Brazilian telecommunications company) |
| TCOC | Transverse Cylindrical Orthomorphic Chart |
| TCOC | Toronto Church of Christ (Toronto, Ontario, Canada) |