| Business | Phone |
| Advanced Graphical Application 900 National Pkwy, Schaumburg 60173 | (847) 517-4200 |
| American Computing Techs Po Box 68455, Schaumburg 60168 | (847) 882-9950 |
| Amt Business Solutions 1365 Wiley Rd, Schaumburg 60173 | (847) 519-0138 |
| Avenir Consulting 830 E Higgins Rd 111h, Schaumburg 60173 | (847) 619-1234 |
| B & T Systems Inc 3580 Hillside Ct, Schaumburg 60192 | (847) 991-1896 |
| B H Royce Corp 2500 W Higgins Rd, Schaumburg 60194 | (847) 781-9429 |
| Bbs Computer Sales & Systems 1817 Largo Ct, Schaumburg 60194 | (847) 490-9180 |
| Beverly & Sutton Consulting 1526 Poplar Creek Dr, Schaumburg 60194 | (847) 310-9590 |
| Bitwise Inc 1515 E Woodfield Rd 930, Schaumburg 60173 | (847) 969-1500 |
| Blue Byte Software Inc 870 E Higgins Rd, Schaumburg 60173 | (847) 534-7934 |
| Boss International Inc 545 W Wise Rd, Schaumburg 60193 | (847) 923-1030 |
| Fisher Unitech 1920 Thoreau Dr N 175, Schaumburg 60173 | (847) 963-8335 |
| Cadserv 1014 E Algonquin Rd 111, Schaumburg 60173 | (847) 303-5858 |
| Euthenics Inc 2155 Stonington Ave 110, Schaumburg 60194 | (847) 352-1612 |
| Emedapps Inc 1325 Remington Rd, Schaumburg 60173 | (847) 490-6869 |
| Effective Data 1515 E Woodfield Rd 770, Schaumburg 60173 | (847) 969-9300 |
| E Square Business Solutions Schaumburg 60193 | (847) 891-8055 |
| Dmg 656 Claridge Cir, Schaumburg 60194 | (847) 885-2442 |
| Digital Dynamics Software Inc 1450 American Ln, Schaumburg 60173 | (847) 330-3830 |
| Comp Soft Tech Solutions Group 11 N Roselle Rd, Schaumburg 60194 | (847) 252-7208 |
| Computer Business Management 1751 W Cottonwood Trl, Schaumburg 60192 | (847) 991-9535 |
| Computer Strategy Coordinators 1100 E Woodfield Rd # 320, Schaumburg 60173 | (847) 330-1313 |
| D & D Internetworking 2385 Hammond Dr, Schaumburg 60173 | (847) 925-8134 |
| Convergent Technologies Inc 334 Council Ct, Schaumburg 60193 | (847) 980-0900 |