| Business | Phone |
| Acs Group 1100 E Woodfield Rd 588, Schaumburg 60173 | (847) 273-7700 |
| Guarantee Pharmaceutical Mach 555 W Central Rd, Schaumburg 60192 | (847) 202-9120 |
| Thomas Engineering Inc 575 W Central Rd, Schaumburg 60192 | (847) 358-5800 |
| Parking Systems Inc 911 Estes Ct, Schaumburg 60193 | (847) 891-3819 |
| Hunter Automated Machine 2222 Hammond Dr, Schaumburg 60196 | (847) 397-5110 |