BeOS isn't unix, it has a unix (posix) compatability layer in it. You can get the same thing for WinNT, but that doesn't make it unix.
You can always get QNX for x86, and I'm sure there are a few off the wall vertical market OSes out there. Last I heard OS/2 was still running around, and there's always GeOS, which is apparently being repackaged as a network appliance OS.
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BeOS isn't unix, it has a unix (posix) compatability layer in it. You can get the same thing for WinNT, but that doesn't make it unix.
You can always get QNX for x86, and I'm sure there are a few off the wall vertical market OSes out there. Last I heard OS/2 was still running around, and there's always GeOS, which is apparently being repackaged as a network appliance OS.