| Abbreviation | Definition |
|---|---|
| TAIX | Texas Alkyls |
| TAIX | Texas Alkyls Incorporated |
| TALX | Trical |
| TALX | Trical Incorporated |
| TALZ | TAL International |
| TALZ | Transamerica Leasing Incorporated |
| TANX | Transitank Car Leasing Corporation |
| TANX | TransiTech Incorporated |
| TANZ | Intermodal Express |
| TANZ | Intermodal Express Incorporated |
| TARX | Sandersville Leasing |
| TARX | Sandersville Leasing Incorporated |
| TASD | Terminal Railway Alabama State Docks |
| TASS | Train Acoustic Sound System |
| TASX | TransRail |
| TASX | TransRail Incorporated |
| TATX | General Electric Railcar Services Corporation |
| TATX | Tanco Transportation Corporation |
| TAXU | Trac Lease |
| TAXU | Trac Lease Incorporated |