| Business | Phone |
| Accolade Solutions Annandale 22003 | (703) 750-3421 |
| Apa Inc 5105 Backlick Rd B, Annandale 22003 | (703) 914-0093 |
| Applied Virtual Systems Inc 8213 Light Horse Ct, Annandale 22003 | (703) 503-6031 |
| Aston It Group 7857 Heritage Dr # 225, Annandale 22003 | (703) 914-0775 |
| Datalab Corp Annandale 22003 | (703) 914-0189 |
| Hyperdyne 4004 Woodland Rd, Annandale 22003 | (703) 354-7054 |
| Information Technology Mgmt 4306 Evergreen Ln, Annandale 22003 | (703) 208-9610 |
| Integrated Business Systems 7857 Heritage Dr # 225, Annandale 22003 | (703) 658-7633 |
| J L Systems Inc 4312 Evergreen Ln A, Annandale 22003 | (703) 941-0077 |
| Spacecom 5105 Backlick Rd # B, Annandale 22003 | (703) 658-9162 |
| Security Design Intl 7023 Little River Tpke 41, Annandale 22003 | (703) 354-7867 |
| Solution Builders Inc 6916 Pacific Ln, Annandale 22003 | (703) 750-1123 |
| Rei Systems Inc 7620 Little River Tpke 500, Annandale 22003 | (703) 256-2245 |
| Micro Engineering Annandale 22003 | (703) 750-7860 |
| Quaint Systems Annandale 22003 | (703) 425-7809 |
| Quality Systems 7700 Little River Tpke, Annandale 22003 | (703) 658-9700 |
| Perfect Systems Inc 8466 Chapelwood Ct, Annandale 22003 | (703) 978-8010 |
| Ok Systems & Software 4031 Medford Dr 3, Annandale 22003 | (703) 941-6440 |