| Business | Phone |
| Southbrook Software 23269 Wooded Way, California 20619 | (301) 475-3884 |
| Cryptolex Inc 44425 Airport Rd # 110, California 20619 | (240) 725-0638 |
| Insight Usa Inc 23330 Cottonwood Pkwy, California 20619 | (301) 866-1990 |
| Integrity Applications 22685 Three Notch Rd # D, California 20619 | (301) 862-2448 |