| Business | Phone |
| Einig & Assoc Inc 43 Germaine Pl, Schaumburg 60173 | (847) 413-9327 |
| Edgilent Corp 700 Cooper Ct, Schaumburg 60173 | (847) 839-7388 |
| Comtec Information Systems 2200 W Higgins Rd 315, Schaumburg 60194 | (847) 490-9750 |
| Reliable Route 850 E Higgins Rd 118, Schaumburg 60173 | (847) 517-1903 |
| Ameritech Amer Info 1515 E Woodfield Rd, Schaumburg 60173 | (312) 490-7600 |
| Nihlent Technologies 10 N Martingale Rd, Schaumburg 60173 | (847) 466-1574 |
| Suha Systems Inc 2500 W Higgins Rd, Schaumburg 60195 | (847) 884-0680 |