| Business | Phone |
| Nova Audio Inc 8807 Emmott Rd # 1800, Houston 77040 | (713) 466-1880 |
| Alpha Automation Inc 4800 San Felipe St, Houston 77056 | (713) 877-8039 |
| American Teleprocessing Corp 10681 Haddington Dr # 100, Houston 77043 | (713) 973-1619 |
| Industrial Micro Solutions 10503 Rockley Rd 104, Houston 77099 | (832) 328-3400 |