| Business | Phone |
| C M Wings Board Testing Inc 835 Stewart Dr, Sunnyvale 94085 | (408) 524-4080 |
| Dolphin Tek 265 Sobrante Way # S, Sunnyvale 94086 | (408) 245-4232 |
| Esp Technology Sunnyvale 94087 | (408) 245-2745 |
| Maxim Integrated Products Inc 120 San Gabriel Dr, Sunnyvale 94086 | (408) 737-7600 |
| Proto Engineering Corp 181 Commercial St, Sunnyvale 94086 | (408) 738-0693 |
| Reliance Technical Svc 895 Kifer Rd, Sunnyvale 94086 | (408) 720-8448 |
| Sierra Circuits 1070 W Evelyn Ave, Sunnyvale 94086 | (408) 522-1500 |
| Pactron Inc 1147 Tasman Dr, Sunnyvale 94089 | (408) 747-1237 |
| South Valley Circuits 550 E Weddell Dr # 3, Sunnyvale 94089 | (408) 719-8290 |
| Westak 1225 Elko Dr, Sunnyvale 94089 | (408) 734-8686 |