| Business | Phone |
| Espec Corp 442 Reynolds Cir, San Jose 95112 | (408) 433-2293 |
| Ist Engineering-Desing & Manufacturer 2299 Ringwood Ave, San Jose 95131 | (408) 432-7480 |
| Sytest Systems Corp San Jose 95131 | (408) 934-8420 |
| Wavecrest Corp 1735 Technology Dr, San Jose 95110 | (408) 436-9000 |
| Yokogawa Test & Measurement 2021 N Capitol Ave # 102a, San Jose 95132 | (408) 941-0120 |