| Abbreviation | Definition |
|---|---|
| TBC | Terminal Buffer Controller |
| TBC | Time Base Correction |
| TBC | To Be Confirmed |
| TBDA | Time Between Data Arrival |
| TBDL | To Be Determined Later |
| TBE | To Be Escorted |
| TBE | To Be Evaluated |
| TBF | Test de Bon Fonctionnement (Spacelab) |
| TBI | Through-Bulkhead Initiator |
| TBS | Task Breakdown Structure |
| TBS | To Be Specified |
| TBS | To Be Superseded |
| TC | TeleCommand |
| TC | TeleCommunications |
| TC | Temperature Compensating |
| TC | Terrestrial Class |
| TC | Test Conductor |
| TC | Thermal Control |
| TC | ThermoCouple |
| TC | Thiokol Corporation |