| Business | Phone |
| Solar.Com 165 Hillcrest Dr, Barrington 60010 | (847) 381-4164 |
| Exectech Microsystems 108 N Glendale Ave, Barrington 60010 | (847) 277-9909 |
| Microtron Corp Barrington 60010 | (847) 382-1611 |
| Innovative Computer Sales Inc 202 James St, Barrington 60010 | (847) 277-7949 |