| Business | Phone |
| Missouri Valley Technologies 3900 S Old Highway 94, St Charles 63304 | (636) 939-1441 |
| Data Entry Svc Corp 546 1st Capitol Dr # 4, St Charles 63301 | (636) 255-8800 |
| Decisions & Advanced Tchnlgy 44 Portwest Ct, St Charles 63303 | (636) 946-7667 |