Source : Free On-Line Dictionary of Computing

RISC System/6000
     
         (Or "RS/6000") {IBM}'s current {RISC}-based {Unix}
        computer.  The RS/6000, announced in 1990, replaced the
        {RT-PC}.  It runs {AIX} 3.x and 4.x.  Most models have an
        {MCA} bus.  A wide range of models are available.
     
        (1995-04-06)