| Abbreviation | Definition |
|---|---|
| TLO | Top-Level Organization |
| TLS | Time Line Sheet |
| TLS | Top Left Side |
| TLS | Transport Layer Security |
| TLSA | Torso Limb Suit Assembly |
| TLSCP | Telescope |
| TLV | Threshold Limit Value |
| TLV | Transporter-Loader Vehicle |
| TLX | The Logical Extension |
| TM | Member Traceability |
| TM | Table Maintenance |
| TM | Technical Management |
| TM | Telemetry |
| TM | Test Mobile |
| TM | Time Management |
| TM | Traffic Model |
| TMA | Technology Mirror Assembly |
| TMAC | Trailer Mounted Air Conditioner |
| TMB | Thermal Mechanical Bending |
| TMB | Transportation Management Bulletin |