A brief history of 8-bit operating systems.
A history of operating systems, by Neal Stephenson.
Dedicated to the preservation and restoration of the Amiga Workbench's history.
A Brief History of Computer Operating Systems from the mid 1950s on.
A source for utilities, history, and everything you need to get your old computer up and running, either in emulation or in real life.
Operating systems are defined here. All type of operating systems like windows,unix,linux,debian are defined here.open bsd as well as bsd is described here