| Business | Phone |
| Celtech Corp 1505 Mercury Cir, Mckinney 75071 | (972) 542-1600 |
| Connector Specialist Inc 10015 Bucker Ln, Mckinney 75071 | (972) 396-0066 |
| Unity Microelectronic 2035 Central Cir, Mckinney 75069 | (972) 562-3105 |
| Raytheon Network Centric Systs 2501 W University Dr, Mckinney 75071 | (972) 542-3301 |