| Abbreviation | Definition |
|---|---|
| TFAC | Twin Faces East Entertainment |
| TFCE | T F C Enterprises, Inc. |
| TFCH | Twenty First Century Health, Inc. (now de-listed) |
| TFCO | Tufco Technologies, Inc. |
| TFFI | Technology Flavors & Fragrance, Inc. |
| TFGP | Total Film Group, Inc. |
| TFGR | Thermo Fibergen, Inc. |
| TFIN | Team Financial, Inc. |
| TFNK | The Football Network |
| TFOBF | Telefonica de Argentina |
| TFONY | Telefonos de Mexico S. A. |
| TFRY | Tasty Fries, Inc. |
| TFSM | 24-7 Media, Inc. |
| TGAL | Tegal Corporation |
| TGBR | Trans- Global Interactive |
| TGCC | Teraglobal |
| TGCI | TGC Industries, Inc. |
| TGCIP | TGC Industries, Inc. Puts |
| TGCIW | TGC Industries, Inc. Warrants |
| TGEN | Targeted Genetics Corporation |