| Business | Phone |
| Gis Solutions Inc 1870 Olympic Blvd # 110, Walnut Creek 94596 | (925) 944-3720 |
| Sterling Commerce 2175 N California Blvd # 425, Walnut Creek 94596 | (925) 296-1800 |
| Agentis International Inc 1990 N California Blvd, Walnut Creek 94596 | (925) 935-5656 |
| Golden State Networks 3164 Putnam Blvd, Walnut Creek 94597 | (925) 933-6500 |
| K-Line 5 Hillcroft Way, Walnut Creek 94597 | (925) 977-9641 |
| Matra Systems 2855 Mitchell Dr, Walnut Creek 94598 | (925) 256-1010 |
| Mobile Greetings Inc 1475 N Broadway, Walnut Creek 94596 | (925) 935-6177 |
| Networks International 47 Quail Ct, Walnut Creek 94596 | (925) 998-6640 |
| Optimal Designs Enterprise Po Box 3128, Walnut Creek 94598 | (925) 945-6739 |
| Sibelius Software 1407 Oakland Blvd # 103, Walnut Creek 94596 | (925) 280-0600 |
| Sierra Vista Assoc 1962 Trinity Ave, Walnut Creek 94596 | (925) 977-9181 |
| Smart Co Inc 2121 N California Blvd, Walnut Creek 94596 | (925) 934-6355 |