| Business | Phone |
| Alliance Computer Technology 22741 Three Notch Rd, California 20619 | (301) 862-7688 |
| Smartronix 22685 Three Notch Rd # E, California 20619 | (301) 862-9524 |
| Total Quality Computers Inc 22861 Three Notch Rd # 3, California 20619 | (301) 863-6121 |
| J B Computing Enterprises 23115 Old Pine Ct, California 20619 | (301) 862-1208 |