| Business | Phone |
| American Scientist 3106 E Nc Highway 54 E, Resrch Trngle Pk 27709 | (919) 549-0097 |
| Va-Performance Data Feedback 615 Davis Dr, Resrch Trngle Pk 27709 | (919) 993-3053 |
| Silicon Semiconductor Corp 633 Davis Dr, Resrch Trngle Pk 27709 | (919) 993-3100 |
| Dcmcgacc 400 Park Offices Dr, Resrch Trngle Pk 27709 | (919) 485-8288 |