| Business | Phone |
| Computer Contraptions 8425 Brentwood Blvd # A2, Brentwood 94513 | (925) 516-0135 |
| Wiztec Inc 234 Oak St # 7, Brentwood 94513 | (925) 516-8500 |
| Media Recovery Inc 652 Tain Ct, Brentwood 94513 | (925) 513-4080 |
| Net Pro 141 Manzanillo Way, Brentwood 94513 | (925) 516-9373 |