Did you know that OS/2 wasn\'t Microsoft\'s first non Unix multi-tasking operating system?

<a href="http://blogs.msdn.com/larryosterman/archive/2004/03/22/94209.aspx">Did you know that OS/2 wasn\’t Microsoft\’s first non Unix multi-tasking operating system?</a> Interesting. this <a href="http://www.google.com/search?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=Xenix">Xenix</a> sounds kind of cool. Actually, <a href="http://en.wikipedia.org/wiki/Xenix">the wikipedia has more on Xenix</a>.