| Business | Phone |
| Mid Atlantic Research Inc 3909 Cornell Pl, Frederick 21704 | (301) 874-4717 |
| Ram Research Corp 10 N Jefferson St, Frederick 21701 | (301) 695-4660 |
| Saic Sultan Ave Bldg 535, Frederick 21702 | (301) 846-1408 |
| Science Applications Intl Corp 5340 Spectrum Dr # N, Frederick 21703 | (301) 698-5991 |