Source : Free On-Line Dictionary of Computing

ISPS
     
        Instruction Set Processor Specifications.  Operational
        hardware specification language.  Successor to ISPL.
     
        ["Instruction Set Processor Specifications", M.R. Barbacci et
        al, IEEE Trans Computers, C-30(1):24-80 (Jan 1981)].
     
        [Bell, Newell, Siewiorek, Barbacci 1982?]