| Business | Phone |
| Baker Robbins & Co 65 E Wacker Pl 1000, Chicago 60601 | (312) 201-8400 |
| G-K Data Svc 6427 N Newgard Ave, Chicago 60626 | (773) 338-3383 |
| Brian S Glass Law Offices 1039 W Berwyn Ave, Chicago 60640 | (773) 561-7282 |
| Data Logic Consulting Inc 101 N Wacker Dr 1800, Chicago 60606 | (312) 853-8200 |
| Creative Software Assoc 75 W Washington St, Chicago 60602 | (312) 726-0035 |