WATFIV

WATFOR and WATFIV (variously, Waterloo FORTRAN or Waterloo FORTRAN IV), developed in Canada at the University of Waterloo, are implementations of the Fortran computer programming language, intended for educational use. WATFOR was the original version. WATFIV was a successor version used from the late 1960s into the mid-1980s. WATFIV was in turn succeeded by later versions of WATFOR.

Because it could complete the three usual steps ("compile-link-go") in just one pass, the system became popular for teaching students computer programming. In addition to faster processing, WATFOR and WATFIV are a programming language dialect, in that they present a somewhat easier version of FORTRAN IV, with new features including format-free input and output and, in WATFIV, a character string type.

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