Looking for non-Linux open-source options? From ghosts of past operating systems to fascinating works in progress, here are my top picks.

History painstakingly preserved.

For the longest time, open-source was nothing more than a buzzword rattling around the brains of technologists and fans of the Linux operating system. Flash forward a decade or so and open-source has ...

Microsoft finally open sources DOS 1.0 - and it's so much more than the code ...