| Business | Phone |
| M T K Electronics Inc 1696 Church St, Holbrook 11741 | (631) 567-4666 |
| Circuit City 7001 Sunrise Hwy, Holbrook 11741 | (631) 567-3906 |
| Computer Mart Inc 5801 Sunrise Hwy, Holbrook 11741 | (631) 567-6730 |
| Omni Circuits Intl Ltd 20 Peachtree Ct # 202, Holbrook 11741 | (631) 467-6664 |
| R & R Electronics Inc 1347 Lincoln Ave, Holbrook 11741 | (631) 585-5968 |
| Radio Shack 5801 Sunrise Hwy, Holbrook 11741 | (631) 589-0995 |
| Siemens Plessey 101 Colin Dr # 6, Holbrook 11741 | (631) 472-4211 |