| Business | Phone |
| Acela Technologies Inc 201 Broadway St # 2 # A, Frederick 21701 | (301) 846-9060 |
| Commputercations Inc 5712 Industry Ln # C, Frederick 21704 | (301) 663-1500 |
| Computer Enhancement Systems 8038 Liberty Rd # D, Frederick 21701 | (301) 620-1580 |
| Digi International 6221 White Oak Dr # 1, Frederick 21701 | (301) 668-8800 |
| Eagle Eye Technologies Inc Frederick 21701 | (240) 674-9036 |
| Frederick Network Technologies Frederick 21701 | (301) 698-2386 |
| Professional Computer Sltns 22 S Market St # 5, Frederick 21701 | (301) 418-6800 |
| Swift Systems & Swift Software 5301 Buckeystown Pike # 302, Frederick 21704 | (301) 682-5100 |
| Tri Net Solutions Group 5246 Regal Ct, Frederick 21703 | (301) 662-7122 |
| Verbatim Technologies Inc 550 Highland St # 417, Frederick 21701 | (301) 620-0260 |