Heath Disk Operating System - HDOS 3.0/3.02
Although initial work on version 3 was done by Heath, they became too busy with their new Z-100 so further development on HDOS was done by the external developers. After initial work done by Gregg Chandler, an employee at Heath Company who had worked on earlier versions of the OS, it was finished and released by William G. Parrott III, David T. Carroll, and Richard Musgrave. This software is in the public domain.
Disk Images:
Coming soon
Manual
HDOS 3.02 Manual in PDF format
Source Code
I believe the following zip file includes the complete HDOS 3.02 Source Code. They are not in the format that was originally distributed, but appear to be complete.
