| Business | Phone |
| Active Computer Technology Inc 9400 W Foster Ave, Chicago 60656 | (847) 298-4520 |
| Affiliated Computer Svc Inc 105 W Adams St, Chicago 60603 | (312) 845-9733 |
| Aquarius Institute Of Computer 28 E Jackson Blvd, Chicago 60604 | (312) 726-5492 |
| Aquarius Institute Of Computer 3425 W Peterson Ave 205, Chicago 60659 | (773) 604-4305 |
| Bird & Assoc 2400 N Lakeview Ave, Chicago 60614 | (773) 248-5611 |
| Dean Kletter Consulting 417 S Dearborn St, Chicago 60605 | (708) 358-0800 |
| Computer Consulting Unlimited 166 W Washington St, Chicago 60602 | (312) 641-2015 |
| Computer Solutions 2201 S Halsted St, Chicago 60608 | (312) 566-9997 |