| Business | Phone |
| Harry Rohde Management Systems 360 W Butterfield Rd 160, Elmhurst 60126 | (630) 834-0600 |
| Johnson Acts 731 Swain Ave, Elmhurst 60126 | (630) 279-0184 |
| Kirix Corp 977 N Oaklawn Ave, Elmhurst 60126 | (630) 563-2790 |
| Microsolve Consulting 650 W Grand Ave 112, Elmhurst 60126 | (630) 834-5000 |
| School Technology Svc 845 Hillside Ave, Elmhurst 60126 | (630) 279-2080 |
| Tech Exchange 857 N Larch Ave, Elmhurst 60126 | (630) 833-0400 |
| Victorin Business Machines 182 N York Rd, Elmhurst 60126 | (630) 279-6700 |