Source : Free On-Line Dictionary of Computing

SPARCsystem 4
     
         A computer built with the {MicroSPARC ii} 70MHz
        {CPU} as used in the {SPARC 5} Model 70.  The SPARCsystem 4 is
        basically a cheaper, cut-down SPARC 5.  It has an 8-bit {pixel
        accelerator} instead of the SBus Turbo GX card.  Memory
        expansion is limited to 160 MB.  Availability was planned for
        March/April 1995.
     
        (1995-02-07)