| Business | Phone |
| Amitex 8700 W Bryn Mawr Ave 800, Chicago 60631 | (773) 714-4940 |
| Cognizant Technology Solutions 120 N La Salle St, Chicago 60602 | (312) 551-0400 |
| Cenox Systems Of America 5630 N Sheridan Rd 801, Chicago 60660 | (773) 769-3077 |
| Data Synapse 203 N La Salle St, Chicago 60601 | (312) 558-1453 |
| SkyView Technology, Inc. 4754 N Lincoln Ave, Floor 2, Chicago 60625 | (773) 561-4502 |