| Abbreviation | Definition |
|---|---|
| TLCC | Transderm Labs Corporation |
| TLCM | Telcom Semiconductor, Inc. |
| TLCP | Telecorp PCS Class A |
| TLCV | Tlc Vision Corporation (formerly T L C Laser Eye Centers, Inc.) |
| TLDN | Tilden Associates, Inc. |
| TLDT | Telident, Inc. |
| TLDTC | Telident, Inc. |
| TLEOF | Telecom Italia, S. P. A. |
| TLGD | TollGrade Communications, Inc. |
| TLGNQ | Telegen Corporation |
| TLLR | Tollycraft Yacht Corporation |
| TLMD | Telemonde, Inc. |
| TLMK | T L M Corporation |
| TLMXY | Tolmex |
| TLNOF | Consolidated Trillion Resources |
| TLNT | Telenetics Corporation |
| TLRK | Tularik, Inc. |
| TLRK | Tularik, Incorporated (de-listed) |
| TLRK | Tularik, Incorporated (de-listed) |
| TLRN | Tellurian, Inc. |