<A HREF="http://www.freedos.org/"
  >FreeDOS</A> is an *(OS), a free _(DOS) clone, based on <A HREF="http://www.monmouth.com/~patv/"
  >Pat Villani's</A> <A HREF="http://server.opensourcedepot.com/DOS/DOS-C.html"
  >DOS-C</A> _(kernel). It currently works, though not compatible with all known _(DOS) extensions and undocumented features (that some apps require), but they are getting there. The project is currently under very active development.
