Source : Free On-Line Dictionary of Computing

SPEC ratio
     
         Results for each individual {benchmark} of the
        {SPEC} benchmark suites, for example {CINT92} and {CFP92},
        expressed as the ratio of the wall clock time to execute one
        single copy of the benchmark, compared to a fixed "SPEC
        reference time", which was chosen early-on as the execution
        time on a {VAX 11/780}.
     
        See also {SPEC rate}.
     
        (1994-11-14)