| Business | Phone |
| Advanced Computer Consulting 527 Oak St, Barrington 60010 | (847) 381-7103 |
| Viking Systems Inc 21012 N 18th St, Barrington 60010 | (847) 382-5504 |
| Virtual Spectrum.Net Inc 21210 Pheasant Trl, Barrington 60010 | (847) 438-6666 |
| Unicomp Systems Inc 110 Deer Valley Dr, Barrington 60010 | (847) 550-6922 |
| Tech Sell 102 Ravine Ln, Barrington 60010 | (847) 526-7911 |
| Toepfer Consulting Barrington 60010 | (847) 486-2244 |
| Specialized Business Solutions Barrington 60010 | (847) 382-5046 |
| Charter Technology Inc 2 Overbrook Rd, Barrington 60010 | (847) 231-3139 |
| Computec Systems Consulting 664 Bent Ridge Ln, Barrington 60010 | (847) 842-0842 |
| Eagle Computers 117 W Main St, Barrington 60010 | (847) 382-9585 |
| Nurav Consulting Corp 1435 Dunheath Dr, Barrington 60010 | (847) 381-1001 |
| Gui Inc W County Line Rd, Barrington 60010 | (847) 382-3180 |
| Indigo Systems & Technology 127 E Main St, Barrington 60010 | (847) 304-7800 |