| Business | Phone |
| Data Consultants Corp 600 N Commons Dr 100, Aurora 60504 | (630) 820-7070 |
| Nettek Inc 2275 Carrington Ln, Aurora 60504 | (630) 978-1760 |
| Networx Computing Solutions 1500 Summerfield Dr, Aurora 60504 | (630) 236-9266 |
| Intratech Technologies 452 Park Ridge Ln A, Aurora 60504 | (630) 978-7880 |