| Business | Phone |
| Advantech Consulting Group 582 Spragues Mill Ct, Ballwin 63011 | (636) 230-7347 |
| Tdk Technologies 930 Kehrs Mill Rd, Ballwin 63011 | (636) 394-1199 |
| Tessellabs 671 Meramec Station Rd, Ballwin 63021 | (314) 283-5227 |
| Strategic Sales Systems Ballwin 63011 | (636) 394-0856 |
| Seven Seas Technologies Inc 310 Clayheath Ct, Ballwin 63011 | (636) 207-7832 |
| Millennium Software Inc 426 Remington Place Dr, Ballwin 63021 | (314) 845-6330 |
| Logical Pathways Ballwin 63011 | (636) 458-4174 |
| Hollander Consulting Po Box 240310, Ballwin 63024 | (314) 821-8424 |
| Harrislogic 319 Consort Dr, Ballwin 63011 | (636) 686-1320 |
| Gregory Kyburz Ballwin 63011 | (636) 256-9351 |
| Creative Data Solutions 750 Woodridge Heights Ct, Ballwin 63011 | (636) 230-7273 |
| Custom Satellite Systems 291 Aspen Village Dr, Ballwin 63021 | (636) 394-3200 |