Source : Free On-Line Dictionary of Computing

LISP70
     
        A {Lisp} dialect descended from {MLISP} and {MLISP2}.  Also
        known as PLISP and VEL.  Useful for parsing.  Only the
        pattern-matching system was published and fully implemented.
        According to Alan Kay, LISP70 had an influence on
        {Smalltalk-72}.  "The LISP70 Pattern Matching System, Larry
        Tesler et al, IJCAI 73.