| Business | Phone |
| Boss Technology 2855 Mitchell Dr, Walnut Creek 94598 | (925) 935-8038 |
| Impression Technology Inc 1777 N California Blvd # 240, Walnut Creek 94596 | (925) 280-0009 |
| Iteamic Private Ltd Inc 2121 N California Blvd # 360, Walnut Creek 94596 | (925) 932-1344 |
| United Infotech Inc 150 N Wiget Ln # 105, Walnut Creek 94598 | (925) 946-0267 |