DEFT(ID:6001/def001)

Structured FORTRAN 

Steele and Sedgwick, University of Toronto, 1973
References:
  • Steele, C. A. and A. E. Sedgwick, "DEFT: a disciplined extension of Fortran" Technical Report, Department of Computer Science, University of Toronto, 1973 view details
  • Meissner, Loren P. "A method to expose the hidden structure of Fortran programs" pp193-198 view details Extract: Extensions to FORTRAN IV
    Extensions to Standard Fortran. One possible way to gain some of the advantages of structured programming would be to add the keywords "if ... then ... else" and "do ... while" to Fortran.
    Several experiments have been made in this direction, including "structured Fortran" extensions named DEFT, IFTRAN, LINUS, MORTRAN, SFTran, and SPIFFY. (No doubt there are others.)
          in Proceedings of the 1974 ACM Annual Conference San Diego, November, 1974 view details