| Business | Phone |
| Byram Labs 55 Fireside Ln, East Setauket 11733 | (631) 474-2525 |
| Dove Electronic Components Inc 39 Research Way, East Setauket 11733 | (631) 689-7733 |
| Electronic Production Tool Inc 10 Technology Dr # 6, East Setauket 11733 | (631) 751-3333 |
| Platinum Electronics 100 S Jersey Ave # 32, East Setauket 11733 | (631) 941-4600 |
| K C Electronics 186 N Belle Mead Rd, East Setauket 11733 | (631) 689-2200 |