| Abbreviation | Definition |
|---|---|
| TGIX | Texasgulf (PCS Phosphate) |
| TGOX | First Union Rail |
| TGOX | US Rail Services |
| TGPU | TAL International |
| TGPU | Transamerica Leasing Incorporated |
| TGPX | Tamak Transportation Corporation |
| TGRX | Transglobal Rail |
| TGSX | Texasgulf (TG Soda Ash) |
| TGSX | Tg Soda Ash Incorporated |
| TGV | Train a Grande Vitesse |
| TGXU | Tiger Cool Express |
| TGXU | Tiger Cool Express LLC |
| TGXZ | Tiger Cool Express |
| TGXZ | Tiger Cool Express LLC |
| THB | Canadian Pacific Railway |
| THB | Toronto, Hamilton and Buffalo Railway (Canadian Pacific Railway) |
| THCX | MG Industries |
| THQU | Thor Quimicos De Mexico |
| THRX | Transportation Corporation of America |
| THRX | Transportation of America |