| Business | Phone |
| Comtech Llc 8618 Westwood Center Dr 100, Vienna 22182 | (703) 689-4611 |
| Conclusive Logic Inc 1593 Spring Hill Rd, Vienna 22182 | (703) 734-3000 |
| Fiberlink Communications Inc 8150 Leesburg Pike, Vienna 22182 | (703) 288-0045 |
| Secure Computing Corp 8000 Towers Crescent Dr, Vienna 22182 | (703) 761-2060 |
| Secure Methods 8460 Tyco Rd # A, Vienna 22182 | (703) 821-0257 |