Source : Free On-Line Dictionary of Computing

RISCiX
     
         /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)