| Business | Phone |
| Applied Computer Graphics 6834 179th St, Tinley Park 60477 | (708) 614-4909 |
| Doorn Sporleder Construction 8255 162nd Pl, Tinley Park 60477 | (708) 429-3360 |
| Computer Training Resources 17239 Oak Park Ave, Tinley Park 60477 | (708) 444-2240 |
| Computer Training Resources 7439 Nottingham Dr, Tinley Park 60477 | (708) 532-5689 |