| Business | Phone |
| Bester Tracking Systems Inc Fairfield 94533 | (707) 399-0360 |
| Chem Sw Inc 420 Executive Ct N # F, Fairfield 94534 | (707) 864-0845 |
| Controlled Information Syst 720 Webster St, Fairfield 94533 | (707) 429-9402 |
| Mis 2000 203 Kilts Ct, Fairfield 94534 | (707) 864-6465 |
| Sunset Systems 3122 Evergreen Dr, Fairfield 94533 | (707) 688-8761 |