| Business | Phone |
| Computer Service Ctr Inc 2358 Hassell Rd, Schaumburg 60194 | (847) 490-9441 |
| Managed Disability Co 1821 Walden Office Sq, Schaumburg 60173 | (847) 397-6311 |
| Infonics 1821 Walden Office Sq 400, Schaumburg 60173 | (847) 397-6020 |
| Techserv Usa 10 N Martingale Rd, Schaumburg 60173 | (847) 466-1005 |
| White Hat Computer Support 4160 Williams Ct, Schaumburg 60192 | (847) 496-4584 |
| Enhanced Networks Schaumburg 60193 | (847) 971-6311 |