Source : Free On-Line Dictionary of Computing

toy language
     
         A language useful for instructional purposes or as
        a proof-of-concept for some aspect of computer-science theory,
        but inadequate for general-purpose programming.  {Bad Thing}s
        can result when a toy language is promoted as a general
        purpose solution for programming (see {bondage-and-discipline
        language}); the classic example is {Pascal}.  Several
        moderately well-known formalisms for conceptual tasks such as
        programming {Turing Machine}s also qualify as toy languages in
        a less negative sense.
     
        See also {MFTL}.
     
        [{Jargon File}]
     
        (1995-05-09)