| Business | Phone |
| Emc Corp 8770 W Bryn Mawr Ave 10, Chicago 60631 | (773) 756-3000 |
| Digilog Electronics Inc 1038 N Ashland Ave, Chicago 60622 | (773) 384-8300 |
| Daxten Llc 811 W Evergreen Ave, Chicago 60622 | (312) 475-0795 |
| Dace International 1140 S Central Ave, Chicago 60644 | (773) 261-8721 |