| Abbreviation | Definition |
|---|---|
| TCP | Terminal Control Program |
| TCP | Type Constrained Programming |
| TCP/IP | Transmission Control Protocol/ Internet Protocol |
| TCQ | Tag Command Queuing |
| TCS | Tucson Computer Society |
| TCS | Type Creator Server |
| TCT | Terminal Control Table |
| TCTTE | Terminal Control Table Terminal Entry |
| TCU | Transmission Control Unit |
| TD | Transient Data |
| TDB | Three Dimensional Button |
| TDD | Technical Deep Dive |
| TDD | Textural Data Definition |
| TDIA | Transient Data Input Area |
| TDL | Target Description Language |
| TDL | Taxis Design Language |
| TDOA | Transient Data Output Area |
| TDP | Transient Data Program |
| TDP | True Desktop Project |
| TDR | Transaction Data Repository |