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

ANSI C
C (ANSI)
ISO C

    (American National Standards Institute C)
   A revision of C, adding function prototypes, structure
   passing, structure assignment and standardised library
   functions.  ANSI X3.159-1989.

   cgram is a grammar for ANSI C, written in Scheme.
   unproto is a program for removing function prototypes to
   translate ANSI C to standard C.  lcc is a retargetable
   compiler for ANSI C.

   (1995-11-26)