| Business | Phone |
| Digicorp Inc 2322 W Clybourn St, Milwaukee 53233 | (414) 343-1080 |
| Galaxy Data Inc 316 N Milwaukee St 570, Milwaukee 53202 | (414) 765-9933 |
| Wisconsin Communications 12211 W Fairview Ave, Milwaukee 53226 | (262) 549-5470 |
| P M Sound Video & Data 3575 W Oakland Ave, Milwaukee 53211 | (414) 906-1949 |