| Business | Phone |
| Automation Technical Svc Houston 77024 | (713) 932-8394 |
| Scientific Controls Research 2603 Joel Wheaton Rd 110, Houston 77082 | (281) 556-5445 |
| Circuit Masters 8938 Spring Branch Dr, Houston 77080 | (713) 467-5599 |
| Det-Tronics Detector Elec 1296 N Post Oak Rd, Houston 77055 | (713) 490-1716 |
| Dynamax Inc 10808 Fallstone Rd, Houston 77099 | (281) 564-5100 |
| Enviroquip 5507 Olympia Fields Ln, Houston 77069 | (281) 397-7993 |
| Microflex 16914 Blend Stone, Houston 77084 | (281) 855-9639 |
| Meason Mortgage 9225 Katy Fwy, Houston 77024 | (713) 467-3500 |
| Maverick Systems & Designs Inc 5829 W Sam Houston Pkwy N, Houston 77041 | (713) 466-9192 |
| Mada Devices Inc 1514 Longacre Dr, Houston 77055 | (713) 464-5817 |
| Log Spec Electronics Houston 77035 | (713) 726-0660 |
| Krieg Technologies Co 7320 Ashcroft Dr 107, Houston 77081 | (713) 988-9300 |