Source : Free On-Line Dictionary of Computing

Continuous System Simulation Language
     
         (CSSL) Versions include {ACSL}, {HYTRAN}, {SL-I},
        {S/360} and {CSMP}.
     
        CSSL(Continuous System Simulation Language) versions I, II,
        III, IV and V have been commercially available since 1968.
        CSSL-I was developed for {Jet Propulsion Labs} in 1968.
        CSSL-III was widely distributed from 1969-1975.  CSSL-IV
        (interactive version) was developed by R. Nilsen and ran on
        over 30 different computers.  Currently CSSL-V is marketed by
        {Simulation Services International} and available on {PC}s and
        {workstations}.
     
        ["The SCi Continuous System Simulation Language (CSSL)",
        Simulation, 9(6), Dec 1967].
     
        [URL?]
     
        (2003-04-15)