| Business | Phone |
| Diotec Electronics 18020 S Hobart Blvd, Gardena 90248 | (310) 767-1052 |
| Telephonics Corp 127 W Walnut St, Gardena 90248 | (310) 217-7090 |
| Advanced American Access 14330 S Figueroa St, Gardena 90248 | (310) 568-9885 |
| Excel Manufacturing Co 14800 S San Pedro St, Gardena 90248 | (310) 323-9630 |
| Thin Film Technology Gardena 90248 | (310) 768-8923 |
| Master-Halco 14330 S Figueroa St, Gardena 90248 | (310) 516-6610 |