| Business | Phone |
| Ace Computer Svc Po Box 461, Frederick 21705 | (301) 846-4202 |
| American Computer & Repair Frederick 21701 | (301) 662-3367 |
| Computer Repair On Wheels Frederick 21701 | (301) 639-0699 |
| Computer Troubleshooters Frederick 21702 | (301) 473-7178 |
| Data Safe Technology Inc 5716 Industry Ln # E, Frederick 21704 | (301) 620-7599 |
| Grabatec Computer Solutions 1007 Barnham Way, Frederick 21702 | (301) 785-7461 |
| In Home Tech Inc 120 W Church St # 2g, Frederick 21701 | (301) 620-1118 |
| Kefauver Computer Svc 8547 Rocky Springs Rd, Frederick 21702 | (301) 694-3007 |
| New Age Electronics 4961 Jefferson Pike # A, Frederick 21703 | (301) 473-8725 |
| Regal Technology Partners Inc 82 Wormans Mill Ct # D, Frederick 21701 | (301) 695-0999 |
| Shadow Ram Computer Svc Frederick 21701 | (301) 698-0445 |
| Frederick Computer 8022 Old Receiver Road, Frederick 21702 | (301) 639-7259 |