| Company Names & Links | Phone Number | Tech Support | BBS/Other |
| Z-SOFT | 404-428-0008 | 404-427-1045 | |
| ZEDCOR | 800-482-4567 | ||
| ZENITH DATA SYSTEMS | 800-842-9000 | 800-877-7704 | |
| ZENOGRAPHICS | 800-566-7468 | 714-851-2191 | 714-851-3860 |
| ZOOM TELEPHONICS | 800-666-6191 | 617-423-1076 |