| Business | Phone |
| Trondent Development Corp 1300 S Grove Ave, Barrington 60010 | (847) 277-0800 |
| Universal Computer Systems 1475 S Barrington Rd, Barrington 60010 | (847) 713-2934 |
| Barrington Software Inc 418 E Oakwood Dr, Barrington 60010 | (847) 487-7020 |
| Software Constructors Inc 317 Roslyn Rd, Barrington 60010 | (847) 304-9560 |
| Software Design Labs Inc 26985 W Fenview Dr, Barrington 60010 | (847) 526-1337 |
| Ret-Tech Software 151 Deer Ln, Barrington 60010 | (847) 382-3903 |
| Peppler & Assoc 22 E Dundee Rd 26, Barrington 60010 | (847) 382-6866 |
| Business Objects 3 Corners Dr, Barrington 60010 | (847) 842-0617 |
| Next Wave Logistics 310 Bishop Ct, Barrington 60010 | (847) 277-7570 |
| Gateway Systems Inc 1000 Hart Rd 220, Barrington 60010 | (847) 381-6674 |
| Gwv & Assoc Barrington 60010 | (847) 842-0659 |
| Krugman Technologies 1000 Hart Rd, Barrington 60010 | (847) 815-1652 |