| Business | Phone |
| Campbell & George Co 1100 Industrial Rd # 12, San Carlos 94070 | (650) 654-5000 |
| Carroll Contac Systems 993 E San Carlos Ave, San Carlos 94070 | (650) 591-3302 |
| Kiefer Machining 940 Commercial St # I, San Carlos 94070 | (650) 631-9037 |
| L-3 Communications Electron 960 Industrial Rd, San Carlos 94070 | (650) 632-4038 |
| M Tree 71 Glenn Way # 4, San Carlos 94070 | (650) 654-1288 |