| Abbreviation | Definition |
|---|---|
| TCGL | 3 C General Corporation |
| TCGL | 3 C General Corporation (de-listed) |
| TCGL | 3 C General Corporation (de-listed) |
| TCGN | Technology General Corporation |
| TCHC | 21st Century Holding Company |
| TCHCW | 21st Century Holding Company Warrants |
| TCHL | Tech Laboratories, Inc. |
| TCHPD | Telechips Corporation |
| TCHPQ | Telechips Corporation |
| TCII | T C I International, Inc. |
| TCII | TCI International, Incorporated (de-listed) |
| TCII | TCI International, Incorporated (de-listed) |
| TCIX | Total Containment, Inc., of Pennsylvania |
| TCIX | Total Containment, Incorporated, of Pennsylvania (de-listed) |
| TCIX | Total Containment, Incorporated, of Pennsylvania (de-listed) |
| TCLN | Techniclone Corporation |
| TCLPZ | T C Pipelines, L. P. |
| TCMM | Telecomm Industries, Inc. |
| TCMM | Telecomm Industries, Incorporated (de-listed) |
| TCMM | Telecomm Industries, Incorporated (de-listed) |