| Business | Phone |
| Interface Technologies 400 Ashland Ave, River Forest 60305 | (708) 366-4411 |
| Scientific Computing Assoc 1410 N Harlem Ave F, River Forest 60305 | (708) 771-4567 |
| Interbox Intenet 1506 Ashland Ave, River Forest 60305 | (708) 488-9014 |
| Open Data Partners 400 Lathrop Ave, River Forest 60305 | (708) 524-8610 |
| Sendmail 520 Thatcher Ave, River Forest 60305 | (312) 474-6424 |
| Triangulum Technologies Inc 7981 Lake St, River Forest 60305 | (708) 366-4670 |