| Business | Phone |
| Altec Industries Inc 1434 Hughes Ford Rd, Frederick 21701 | (301) 662-6262 |
| K A Systems 100 Wormans Mill Ct, Frederick 21701 | (301) 846-0400 |
| Moleton Sales Assoc 186 Thomas Johnson Dr # 100, Frederick 21702 | (301) 668-8555 |
| Moleton Sales Assoc 608 Fairview Ave, Frederick 21701 | (301) 668-7627 |
| Nexus Technology Sales Inc 301 W Patrick St # 100a, Frederick 21701 | (301) 663-4159 |
| Statec 8801 River Oaks Ter, Frederick 21704 | (301) 846-9204 |
| Thompson-Withers 4640 Wedgewood Blvd # 107, Frederick 21703 | (410) 781-7172 |
| Yes Enterprises 811 Stratford Way # J, Frederick 21701 | (301) 845-7368 |