Re: open-source operating systems

[Edmund GRIMLEY EVANS <edmundo@rano.demon.co.uk>]

I asked: 

> what open-source operating systems exist today?
>
> By "operating system" I mean something that provides at the very least
> preemptive multitasking, and by "exist" I mean either fully functional
> or working to a reasonable extent and being actively developed.

There were a few additions suggested to the four I mentioned, so here's
the updated list:

 - Hurd
 - Linux
 - various BSD derivatives
 - VSTa (http://www.zendo.com/vsta/)
	version 1.6.2 is expected soon
 - Squeak (http://squeak.cs.uiuc.edu/):
	a Smalltalk that can run on bare hardware
 - Sprite (ftp://ftp.cs.berkeley.edu/ucb/sprite/sprite.html):
	no longer being developed
 - Caldera's DR-DOS

In addition to http://www.cs.arizona.edu/people/bridges/os/free.html
there's also a list at http://camars.kaist.ac.kr/~lhg/os.html#FREEOS

My conclusion: there are surprisingly few free operating systems.

Edmund