| Business | Phone |
| Cap Data Pos 3491 Turner Ct, Concord 94518 | (925) 691-0862 |
| Custom Business Solutions 1110 Burnett Ave, Concord 94520 | (925) 363-9000 |
| Diablo Cash Register & Systems 2490 Arnold Industrial Way, Concord 94520 | (925) 798-1550 |
| Paper-Net 2490 Arnold Industrial Way # C, Concord 94520 | (925) 681-2100 |