| Business | Phone |
| Amdex Corp 8403 Colesville Rd # 850, Silver Spring 20910 | (301) 588-4000 |
| Tfs Group Inc 2141 Industrial Pkwy # 104, Silver Spring 20904 | (301) 625-1500 |
| Scorpion Information Tchnlgy 8701 Georgia Ave # 403, Silver Spring 20910 | (301) 495-2370 |
| Daou Systems Inc 2713 Fairdale Ter, Silver Spring 20905 | (301) 879-7484 |