RISCiX

from The Free On-line Dictionary of Computing (8 July 2008)

RISCiX

   <operating system> /risk-icks/ (Or "RISC iX") {BSD}-based
   {Unix} developed by {Acorn Computers Ltd.} (Cambridge, UK) to
   run on 32-bit {ARM} {RISC} processors.

   RISCiX was launched circa 1989 for three production machines -
   the R140, R260, the discless R225; and other prototypes.

   (2003-09-24)