| Business | Phone |
| Cyborg Systems Inc 707 Eckert Ln, Columbia 62236 | (618) 281-5527 |
| Hi Resolution Systems Inc 208 N Main St # H, Columbia 62236 | (618) 281-9000 |
| Personal Best Software Columbia 62236 | (618) 281-4405 |
| Radar Computer Solutions 207 N Main St 212, Columbia 62236 | (618) 281-8686 |