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| Telco Systems/BATM | Tele Supply | Tele-Tech |
| Telebyte Technology | Telecall America | Telecontrolli |
| Teledyne Electronic Tech. Kinetics | Teledyne Relays | Telegartner |
| Telenetics | Telesystems | TeleVideo |
| Telewave | Telex Communications | Telex Communications/Electro-Voice |
| Teltone | Temp-Flex Cable | Tempco Electric Heater |
| Tempil | Tempo-Camarillo | Tempo-Mesa |
| Tempo-Vista | Ten-Tec | Tenma Test Equipment |
| Tensolite | Tensolite RF | Tepro |
| Teridian Semiconductor | Tes | tesa tape |
| Test-Um | Testo | TEW America |
| TEW Japan | Texas Instruments (TI) | Texas Instruments RFid Systems |
| Texcell-Netcom | Texit | Texmate |
| Textron Aerospace Fasteners | Texwipe | TGL Technologies |
| th-contact Div. of Saia-Burgess USA | Thales Components Corp. (TCC) | Thales Computers |
| Thales Electronic Devices | Thales Optem | Thandar |
| THAT Corporation | The Filter Factory | Therm-O-Link |
| Thermal Wire & Cable | Thermax/CDT | Thermo Cool |
| Thermo Electric PA | Thermo Fischer Scientific | Thermo-Electric |
| Thermodisc | Thermoid | Thermor |
| Thermoset Lord Chemical Products | Thermshield | Thin Film Technology |
| THK | Thomas & Betts Aster Products | Thomas & Betts Electrical |
| Thomas & Betts Premises Wire Group |
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