| Business | Phone |
| Diablo Retail Systems 5750 Imhoff Dr, Concord 94520 | (925) 934-0120 |
| Future Technology Industry 1870 Arnold Industrial Pl 1045, Concord 94520 | (925) 689-1110 |
| B C Pc 1245 Cape Cod Ct, Concord 94521 | (925) 825-3539 |
| Compusa 1975 Diamond Blvd, Concord 94520 | (925) 681-0255 |
| Concord Technology Concord 94520 | (925) 969-9905 |
| Decotech Systems 2151 Salvio St, Concord 94520 | (925) 288-9600 |
| Guy Computer 1342 Shakespeare Dr, Concord 94521 | (925) 459-2723 |
| Macvolks Inc 1921 Concord Ave, Concord 94520 | (925) 726-3400 |
| Startek Computers Inc 1320 Willow Pass Rd, Concord 94520 | (925) 688-0886 |