Source : Free On-Line Dictionary of Computing

System Control Language
     
         (SCL) The {command language} for the {VME/B}
        {operating system} on the {ICL2900}.  SCL was {block
        structured} and supported strings, lists of strings
        ("superstrings"), {integer}, {Boolean}, and {array} types.
        You could trigger a {block} whenever a condition on a variable
        value occured.  It supported {macros} and default arguments.
        Commands were treated like procedure calls.
     
        ["VME/B SCL Syntax", Intl Computers Ltd. 1980].
     
        (2003-01-08)