| Business | Phone |
| Yvonne De Vile Scientific 307 Maple Ave W, Vienna 22180 | (703) 890-0312 |
| Science & Technology Dev Inst 2159 Chain Bridge Rd, Vienna 22182 | (703) 281-0225 |
| Randle Inc Vienna 22182 | (703) 759-5257 |
| Rightstar Systems Inc 100 East St Se 202, Vienna 22180 | (703) 242-7200 |
| Pilot Research Assoc Inc 1953 Gallows Rd 230, Vienna 22182 | (703) 883-2522 |