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

Fortran 77

   A popular version of Fortran with Block IF, PARAMETER and
   SAVE statements added, but still no WHILE.  It has
   fixed-length character strings, format-free I/O, and arrays
   with lower bounds.

   [ANSI X3.9-1978].

   GNU version (ftp://gnu.org/pub/gnu/g77).

   Amiga version (ftp://ftp.cso.uiuc.edu/amiga/fish/ff470/BCF).

   (1994-12-16)