<A HREF="http://www.riscos.com/"
  >RISC OS</A> is the nifty *(OS) that runs on (defunct?) <A HREF="http://www.acorn.co.uk/"
  >Acorn</A>'s <A HREF="http://www.arm.com/"
  >ARM</A>-based RISC PC (now <A HREF="http://www.riscstation.co.uk/"
  >RiscStation</A>). Remember how they were the first to introduce inexpensive RISC technology into consumer electronics to compete with the usual bloated designs?

See also <A HREF="http://acorn.riscos.com/"
  >The RISC OS Knowledge Base</A>, <A HREF="http://www.riscos.org/"
  >RISCOS.org</A> and <A HREF="http://www.riscos.net/"
  >RISCOS.NET</A>.