| Business | Phone |
| Integrity Business Systems 52 S Kensington Ave, La Grange 60525 | (708) 482-3925 |
| Loss Control Software Co 6920 Willow Springs Rd, La Grange 60525 | (708) 579-3910 |
| M 3 Designs Inc 412 Leitch Ave, La Grange 60525 | (708) 352-8567 |
| Taylor Technologies 5255 Dansher Rd, La Grange 60525 | (708) 482-9422 |
| Transformatics 10555 74th St, La Grange 60525 | (708) 579-9560 |
| 411 Computers Inc 6432 Joliet Rd, La Grange 60525 | (708) 482-4117 |
| Linlar Enterprises 6406 Joliet Rd, La Grange 60525 | (708) 588-1100 |
| Parasoft 1030 S La Grange Rd 22, La Grange 60525 | (708) 354-5940 |
| Ultimate Systems Inc 6502 Joliet Rd, La Grange 60525 | (708) 579-9130 |