V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

LIS
       Logical IP Subnet (RFC 1577, ION)


The Free On-line Dictionary of Computing (30 December 2018):

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)


Bouvier's Law Dictionary, Revised 6th Ed (1856):

LIS. A suit; an action; a controversy in court; a dispute.