| Business | Phone |
| Best Friends Software Mans 655 N La Grange Rd, Frankfort 60423 | (815) 806-2130 |
| Schwider Systems 7842 W Laurel Dr, Frankfort 60423 | (815) 469-2834 |
| Computer Dynamics Inc 10580 Lexington Ln, Frankfort 60423 | (815) 464-5200 |
| Gnc Consulting Inc 20 S La Grange Rd, Frankfort 60423 | (815) 469-7255 |