| Business | Phone |
| Bohica Sales Corp 7711 Mary Cassatt Dr, Potomac 20854 | (301) 765-8100 |
| Cetech Electronics Corp 8204 Bells Mill Rd, Potomac 20854 | (301) 983-2140 |
| S & E Assoc 9005 Willow Valley Dr, Potomac 20854 | (301) 251-1800 |
| Design Marketing Inc 11912 Ledgerock Ct, Potomac 20854 | (301) 424-0107 |
| Getis Associates Inc 9212 Copenhaver Dr, Potomac 20854 | (301) 251-1801 |