| Business | Phone |
| E Keis Systems 11350 Random Hills Rd, Fairfax 22030 | (703) 279-6590 |
| Jolly Roger Geo Systems Inc 3607 Great Laurel Ln, Fairfax 22033 | (703) 437-5710 |
| Mindshift Technologies 3975 Fair Ridge Dr S200, Fairfax 22033 | (571) 432-4086 |
| Inter Analog Inc 4520 Braeburn Dr, Fairfax 22032 | (703) 319-1486 |