| Business | Phone |
| Midwest Instrument Co 2134 Routh St, Dallas 75201 | (214) 339-9943 |
| Devices Inc 10300 N Central Expy, Dallas 75231 | (214) 361-6007 |
| Zilog 8512 Stillwater Dr, Dallas 75243 | (214) 341-4373 |
| Airep Electronics Inc 10675 E Northwest Hwy, Dallas 75238 | (214) 349-4360 |
| Data Marketing Assoc Inc 14235 Proton Rd, Dallas 75244 | (972) 661-0300 |
| Wilson-Mohr Inc 4230 Spring Valley Rd, Dallas 75244 | (972) 991-0316 |