| Abbreviation | Definition |
|---|---|
| TLT | Traffic Load Table |
| TLV | Type, Length, Value |
| TMC | Traffic Message Channel |
| TMCR | Transaction Manager Control Record |
| TMR | Trunked Mobile Radio |
| TMS | Topical Memory System |
| TN | Tunneling Network |
| TNC | Terminal Node Controller |
| TNC | Terminal-Node Computer |
| TNC | TNC16 Networking Conference |
| TNE | Transmission Network Applications |
| TNE | Trusted Network Environment |
| TNEF | Transportation Neutral Encapsulation Format |
| TNEP | Transmission Network Expansion Planning |
| TNF | Trace Normal Form |
| TNN | The NETWORK Network |
| TNN | Top Notch Networking |
| TNS | Transparent Network Substrate |
| TNS | Transport Network Substrate |
| TNSQM | Tivoli Network Service Quality Manager |