Ratfiv
Ratfiv is an enhanced version of the Ratfor programming language, a preprocessor for Fortran designed to give it C-like capabilities. Fortran was widely used for scientific programming but had very basic control-flow primitives and no "macro" facility which limited its expressiveness.
The name of the language is a pun.
Ratfiv was developed by Bill Wood at the Institute for Cancer Research, Philadelphia, PA in the early 1980s and released on several DECUS SIG tapes. It is based on the original Ratfor by B. Kernighan and P. J. Plauger, with rewrites and enhancements by David Hanson and friends, Joe Sventek and Debbie Scherrer.
Ratfiv V2.1 was distributed on the DECUS RSX82a SIG tape.