| Business | Phone |
| Agilent Technologies Inc 19 Plumrose Ln, Schaumburg 60194 | (847) 882-3190 |
| Apple Store K303 Woodfield Mall, Schaumburg 60173 | (847) 240-6280 |
| Exectech Microsystems 1901 N Roselle Rd # 800, Schaumburg 60195 | (847) 277-9909 |
| Century Computer Systems 51 W Schaumburg Rd, Schaumburg 60194 | (847) 891-1760 |
| Comp Usa 1045 E Golf Rd, Schaumburg 60173 | (847) 619-1221 |
| Computer Health Network 1721 Moon Lake Blvd 500, Schaumburg 60194 | (847) 517-4240 |
| Computer Sciences Corp 1400 American Ln, Schaumburg 60173 | (847) 517-7023 |
| Computerese 815 Blenheim Dr, Schaumburg 60195 | (847) 885-9161 |
| Coretronic Corp 40 W Schaumburg Rd, Schaumburg 60194 | (847) 885-0818 |
| Hagerman & Co 1051 Perimeter Dr 1170, Schaumburg 60173 | (847) 995-0639 |