| Business | Phone |
| Global Research & Development 5597 Seminary Rd, Falls Church 22041 | (703) 933-8737 |
| Raytheon Co 7700 Arlington Blvd, Falls Church 22042 | (703) 560-5000 |
| Mitretek Systems Inc 3150 Fairview Park Dr, Falls Church 22042 | (703) 610-2000 |
| Park City Solutions 5113 Leesburg Pike, Falls Church 22041 | (703) 339-2272 |
| Nettleton Travel Research Ctr 412 N Cherry St, Falls Church 22046 | (703) 533-7454 |