| Business | Phone |
| Sawyer Automated Systems 1121 Merril St, Winnetka 60093 | (847) 446-0100 |
| Vortek Consulting Inc 456 W Frontage Rd 7, Winnetka 60093 | (847) 784-8760 |
| Advance Concepts Lab Inc 1780 Maple St, Winnetka 60093 | (847) 784-9390 |
| Ops Shop 436 W Frontage Rd, Winnetka 60093 | (847) 446-8215 |
| Tera Comp Computer Consulting 911 Green Bay Rd, Winnetka 60093 | (847) 446-0097 |