| Business | Phone |
| Dy-4 Systems Ltd 800 E Campbell Rd 142, Richardson 75081 | (972) 907-1110 |
| Net Span Corp 1411 E Campbell Rd 1400, Richardson 75081 | (972) 690-8844 |
| Addax Computer Corp 690 Glenview Rd, Richardson 75080 | (972) 234-5698 |
| A Ic Systems 1110 E Collins Blvd 122, Richardson 75081 | (972) 644-1011 |
| American Computer Wholesale 1164 Commerce Dr, Richardson 75081 | (972) 437-6961 |
| P H Computers Inc 1303 Columbia Dr 213, Richardson 75081 | (972) 918-9270 |