| Business | Phone |
| Source One Inc 8565 Atlas Dr, Gaithersburg 20877 | (301) 977-6260 |
| Myer Emco 5 N Frederick Ave, Gaithersburg 20877 | (301) 208-2107 |
| Myer-Emco 2 Bureau Dr # B, Gaithersburg 20878 | (301) 208-2100 |
| Gramophone 16331 Shady Grove Rd, Gaithersburg 20877 | (301) 947-8806 |
| Innovative Multimedia 7960 Cessna Ave, Gaithersburg 20879 | (301) 208-0054 |