| Abbreviation | Definition |
|---|---|
| TBPA | Tau Beta Pi Association |
| TC | Tavern Club |
| TC | Tomorrow's Child |
| TC | TraumaCare |
| TC/M | Tomorrow's Child/ Michigan |
| TCA | Taipei Computer Association |
| TCAN | Toronto Climate Action Network |
| TCAP | The Caregivers Advisory Panel |
| TCC | The Country Club |
| TCCD | Therapeutic Center for Chronic Diseases |
| TCDHC | Tri- County Dental Health Council |
| TCER | Tokyo Center for Economic Research |
| TCF | The Century Foundation |
| TCF | The Citizens Foundation |
| TCF | The Compassionate Friends |
| TCF | The Conservation Fund |
| TCFB | Treasure Coast Food Bank |
| TCFV | Texas Council on Family Violence |
| TCG | Tongan Crip Gang |
| TCGN | Toronto Community Garden Network |