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

RATional Fortran
RATFOR

    (RATFOR) Brian Kernighan's Fortran
   preprocessor that allows programming with C-like control
   flow.  RATFOR is mainly of historical significance.

   A translator from Ratfor to Fortran IV was posted to
   comp.sources.Unix volume 13.

   (ftp://ftp.wustl.edu/mirrors/Unix-c/languages/ratfor.tar-z).

   ["Ratfor - A Preprocessor for a Rational Fortran",
   B.W. Kernighan, Soft Prac & Exp 5:395-406, Oct 1975].

   ["Software Tools", B.W. Kernighan & P.J. Plauger, A-W, 1976].

   (2001-07-31)