Short for RATional FORtran.
http://sepwww.stanford.edu/doku.php?id=sep:software:ratfor

RATFOR is a preprocessor for older [FORTRAN] code that provides
some C-like flow control program structures.

See [Software Tools].

----
[DKF]: '''Did you know''' that Ratfor is what [m4] was originally designed to be used to implement.
----
[Category Language]