Non-Windows, non-Unix-like OS's?

Posted by dsimcha on Super User See other posts from Super User or by dsimcha
Published on 2010-05-20T02:55:28Z Indexed on 2010/05/20 3:02 UTC
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Filed under:

operating-systems

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Windows

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unix

Since most operating systems I've heard of besides Windows seem to derive their heritage from Unix, I've been curious whether any OS's with the following characteristics exist:

Not generally considered Unix-like, i.e. wasn't designed with Unix compatibility as a primary goal, doesn't use X11 as its default GUI in the most common distributions, doesn't support Unix commands by default, etc.
Not in the Windows NT family.
Is a modern production operating system, not a purely legacy operating system, a research/hobby project or an OS that's still in an alpha state.
Is targeted at commodity x86/x64 PC hardware.

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