| Abbreviation | Definition |
|---|---|
| TNB | Thomas & Betts Corporation |
| TND | Tele NordEste Celular Partic |
| TNE | Tele Norte Leste Participaco |
| TNH | Terra Nitrogen Company, L. P. |
| TNL | Technitrol, Inc. |
| TNM | Thomas Nelson, Inc. |
| TNMB | Thomas Nelson, Inc. Class B |
| TNO | True North Communications |
| TNP | T N P Enterprises, Inc. |
| TNP | Tsakos Energy Navigation, LTD. |
| TNT | Ao Tatneft |
| TNU | Teligent, Inc. |
| TOD | Todd Shipyards Corporation |
| TOK | Tokheim Corporation |
| TOL | Toll Brothers, Inc. |
| TOM | Tommy Hilfiger Corporation |
| TOO | TOO, Inc. |
| TOS | Thomson Corporation |
| TOT | Total Fina, S. A. |
| TOY | Toys R Us, Inc. |