FORTRAN 66 standard
Generation of Fortran IV
Fortran family
Imperative

Exploring language family "FORTRAN IV standard"

Basic FORTRAN    1964 FORTRAN IV standard   United States    
BTL Fortran    1967 FORTRAN IV standard   United States   Bell labs Fortran IV 
DEFT    1973 FORTRAN IV standard   Canada   Structured FORTRAN 
DELtran    1975 FORTRAN IV standard   United States   Fortran interpreted to DEL 
FORTRAN IV    1962 FORTRAN IV standard   United States   first major release of FORTRAN 
RC-Fortran    1968 FORTRAN IV standard   Denmark   Fortran for the RC 4000 
WATFIV    1969 FORTRAN IV standard   Canada   Waterloo FORTRAN 2nd version 
WATFOR    1966 FORTRAN IV standard   Canada   WATerloo FORtran