| Business | Phone |
| A J Thomas Midwest Cash Rgstr 1220 W Randolph St, Chicago 60607 | (312) 829-7300 |
| Fullerton Cash Register Co 5791 N Elston Ave, Chicago 60646 | (773) 775-4880 |
| Franklin Cash Register 4257 N Milwaukee Ave, Chicago 60641 | (773) 286-6613 |
| Business Paper Products Co 3057 N Rockwell St, Chicago 60618 | (773) 583-0002 |
| Extreme Technologies 1140 W Wilson Ave, Chicago 60640 | (773) 293-4432 |
| Cash Register Svc 3300 N Harlem Ave, Chicago 60634 | (773) 545-3748 |
| Cash Registers Unlimited 1645 N Springfield Ave, Chicago 60647 | (773) 235-0700 |
| Electron Technologies & Svc 2646 W Chicago Ave, Chicago 60622 | (312) 645-9311 |
| Diversey Cash Register 2837 W Diversey Ave, Chicago 60647 | (773) 394-4000 |
| Electron Technologies & Service, Inc. 2646 W Chicago Ave, Chicago 60622 | (773) 645-9311 |