| Business | Phone |
| C J Alexander Systems Inc 5421 Lakeside Ave N, Minneapolis 55429 | (763) 535-9565 |
| Mid America Business Systems 2500 Broadway St Ne # 100, Minneapolis 55413 | (612) 378-3800 |
| Tab Products Co 4445 W 77th St # 100, Minneapolis 55435 | (952) 830-1912 |