| Abbreviation | Definition |
|---|---|
| TKN | Thermotrex Corporation |
| TLF | Leather Factory, Inc. |
| TLL | Teletouch Communications, Inc. |
| TLU | Targets Trust II |
| TLX | Trans Lux Corporation |
| TLZ | Thermolase Corporation |
| TLZU | Thermolase Corporation |
| TMD | Thermedics, Inc. |
| TMG | Transmontaigne, Inc. |
| TMI | Team, Inc. |
| TMP | Tompkins Trustco, Inc. |
| TMQ | Thermoquest Corporation |
| TNR | Tenera, Inc. |
| TO | Tech Ops SEVCON, Inc. |
| TOC | Thermo Optek Corporation |
| TOF | Tofutti Brands, Inc. |
| TOX | Medtox Scientific, Inc. |
| TPC | Top Air Manufacturing, Inc. |
| TPN | TownPages Net Com, P. L. C. |
| TPS | Top Source Technologies, Inc. |