Plan 9

   In  the  late 1980s, researchers at Bell Labs (especially Rob Pike of
   Kernighan  &  Pike  fame)  got bored with the limitations of UNIX and
   decided  to reimplement the entire system. The result was called Plan
   9 in "the Bell Labs tradition of selecting names that make marketeers
   wince."  The developers also wished to pay homage to the famous film,
   "Plan  9  From Outer Space", considered by some to be the worst movie
   ever  made.  The  source  is available for download under open-source
   terms. The developers and a small fan base hang out at comp.os.plan9,
   where  one can occasionally hear "If you want UNIX, you know where to
   find it"

[glossary]