Source : Free On-Line Dictionary of Computing

LIS
     
        Langage Implementation Systeme.
     
        A predecessor of {Ada} developed by Ichbiah in 1973.  It was
        influenced by {Pascal}'s data structures and {Sue}'s control
        structures.  A type declaration can have a low-level
        implementation specification.
     
        ["The System Implementation Language LIS", J.D. Ichbiah et al,
        CII Honeywell-Bull, TR 4549 E/EN, Louveciennes France (Dec
        1974)].
     
        ["The Two-Level Approach to Data Independent Programming in
        LIS", J.D. Ichbiah et al, in Machine Oriented Higher Level
        Languages, W. van der Poel ed, N-H 1974, pp.161-169].
     
        (1994-12-01)