| Business | Phone |
| Alliance Technology Group 1701 E Woodfield Rd # 611, Schaumburg 60173 | (847) 619-2000 |
| Global Knowledge Network Inc 1500 Mcconnor Pkwy 500, Schaumburg 60173 | (847) 619-6930 |
| Bright Insight Computer Instr 1320 Tower Rd, Schaumburg 60173 | (847) 490-0070 |
| Excalibur Consulting Group Inc 939 N Plum Grove Rd E, Schaumburg 60173 | (847) 517-1010 |
| Compunet 1111 N Plaza Dr, Schaumburg 60173 | (847) 330-2835 |
| Mits Inc 1701 E Woodfield Rd 750, Schaumburg 60173 | (847) 413-9334 |
| Pcs Intl 1340 Remington Rd W, Schaumburg 60173 | (847) 310-0080 |
| Smart Computing Inc 1920 Thoreau Dr N, Schaumburg 60173 | (847) 925-9741 |
| Compu Net 1111 N Plaza Dr, Schaumburg 60173 | (847) 986-0010 |
| Computer Training Source 1320 Tower Rd 107, Schaumburg 60173 | (847) 240-1972 |
| Hands On Technology Transfer 1701 E Woodfield Rd, Schaumburg 60173 | (847) 517-8468 |
| Pegasus Knowledge Solutions 1111 N Plaza Dr 310, Schaumburg 60173 | (847) 995-1100 |
| Sage Group Consulting Inc 1355 Remington Rd, Schaumburg 60173 | (847) 490-3590 |
| Scalar Usa 1305 Remington Rd, Schaumburg 60173 | (847) 490-8198 |
| American Professional Group 2360 Hassell Rd A, Schaumburg 60194 | (847) 882-7840 |