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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Application Visualisation System
   AVS
      <tool, graphics> (AVS) A portable, modular, Unix-based
      graphics package supported by a consortium of vendors
      including Convex, DEC, IBM, HP, SET Technologies,
      Stardent and WaveTracer.
      (1994-11-28)