| Business | Phone |
| Silicon Graphics Inc 12200 Plum Orchard Dr # G, Silver Spring 20904 | (301) 572-1980 |
| Plan Graphics 1300 Spring St # 210, Silver Spring 20910 | (301) 588-8535 |
| M-Cubed Information Systems 1400 Spring St, Silver Spring 20910 | (301) 585-0150 |
| Interface Multimedia Inc 8505 Fenton St # 212, Silver Spring 20910 | (301) 585-0068 |