| Business | Phone |
| M C Software 7260 W Pueblo Ln, Palos Heights 60463 | (708) 448-4944 |
| Municiple Systems Inc 7330 W College Dr, Palos Heights 60463 | (708) 448-6934 |
| P C Express Inc 6527 W 127th St, Palos Heights 60463 | (708) 396-8500 |
| Rjr Computing Solutions 12102 S 70th Ct, Palos Heights 60463 | (708) 361-6510 |