<A HREF="http://www.cs.vu.nl/~ast/minix.html">Minix</A> is _(Andy Tanenbaum)'s famous *(Unix)-like *(OS) in 2 versions:

<UL>
  <LI>MINIX 1.5 (Intel, Macintosh, Amiga, Atari, SPARC)</LI>
  <LI>MINIX 2.0 (Intel CPUs from 8088 to Pentium)</LI>
</UL>