| Abbreviation | Definition |
|---|---|
| TKAT | Technology 80, Inc. |
| TKCI | The Keith Companies, Inc. |
| TKCI | The Keith Companies, Incorporated (de-listed) |
| TKCI | The Keith Companies, Incorporated (de-listed) |
| TKGF | TekGraf, Inc. |
| TKGF | TekGraf, Incorporated (de-listed) |
| TKGF | TekGraf, Incorporated (de-listed) |
| TKGFW | TekGraf, Inc. Warrants |
| TKGFW | TekGraf, Incorporated Warrants (de-listed) |
| TKGFW | TekGraf, Incorporated Warrants (de-listed) |
| TKIOY | Tokio Marine & Fire Insurance |
| TKLB | Techlabs, Inc. |
| TKLC | E K E L E C |
| TKLC | T E K E L E C |
| TKOCF | Taseko Mines, LTD. |
| TKSP | Track Sport, Inc. |
| TKTL | Track N Trail |
| TKTX | Transkaryotic Therapies |
| TKZA | Tikal Resources Corporation |
| TLAB | Tellabs, Inc. |