| Business | Phone |
| Mpa Inc 1663 Campbell Ave, Des Plaines 60016 | (847) 699-0771 |
| R J Kallas & Assoc 1477 E Thacker St, Des Plaines 60016 | (847) 299-4100 |
| Rjm Systems Inc 712 Madelyn Dr, Des Plaines 60016 | (847) 228-1130 |
| Nspin Llc 950 Lee St, Des Plaines 60016 | (847) 299-4920 |
| Peterson Technology Partners 101 Ambleside Rd, Des Plaines 60016 | (847) 768-9194 |
| International Network Svc 9450 Bryn Mawr Ave 325, Des Plaines 60018 | (847) 928-8700 |
| Kanbay Inc 6400 Shafer Ct 100, Des Plaines 60018 | (847) 518-0508 |
| Kanbay International Inc 6400 Shafer Ct 100, Des Plaines 60018 | (847) 384-6100 |
| Logility Inc 1700 E Higgins Rd 280, Des Plaines 60018 | (847) 699-6620 |
| Micro Strategy 10275 W Higgins Rd 400, Des Plaines 60018 | (847) 795-3500 |
| Perelandra Systems Inc 1695 S River Rd, Des Plaines 60018 | (847) 699-9191 |
| Proquis Inc 3158 S River Rd, Des Plaines 60018 | (847) 768-6630 |
| Saven Technologies 6250 N River Rd, Des Plaines 60018 | (847) 993-2001 |
| Technology Advisors, Inc. 2340 S River Rd, Des Plaines 60018 | (847) 655-3400 |
| Universal Information Systems 2720 S River Rd, Des Plaines 60018 | (847) 298-0710 |
| Zero Access Inc 50 W Oakton St, Des Plaines 60018 | (847) 795-0770 |