| Business | Phone |
| Cor Data Systems 11350 Random Hills Rd, Fairfax 22030 | (703) 934-6197 |
| Data Systems Analysis Inc 10400 Eaton Pl 500, Fairfax 22030 | (703) 591-3704 |
| Msa Inc 9520 Lee Hwy, Fairfax 22031 | (703) 273-0006 |
| Quality Resource Systems Inc 11350 Random Hills Rd 100, Fairfax 22030 | (703) 352-7393 |
| Communication System Design 4726 Forestdale Dr, Fairfax 22032 | (703) 538-6177 |
| Synectics Corp 10400 Eaton Pl, Fairfax 22030 | (703) 591-8129 |
| Wave Edge Technologies 5585 Guinea Rd, Fairfax 22032 | (703) 250-2373 |