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Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   cgram
      <language> An ANSI C LL1 or LL2 grammar written in
      Scheme by Mohd Hanafiah Abdullah <napi@cs.indiana.edu>.  A
      program (f-f-d.s) extracts the FIRST/FOLLOW/DIRECTOR sets.
      (ftp://primost.cs.wisc.edu/pub/comp.compilers/cgram-ll1.Z).
      (2005-01-07)