X3J3/96-112r1
17 May 1996
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To: X3
From: X3J3
Subject: FORTRAN 77
References: X3J3/94-073, 94-112, 94-153, 95-048, 95-056, 95-110
At X3J3 meeting #137, May 1996, X3J3 voted to reaffirm its earlier recommendation to
withdraw X3.9-1978 (FORTRAN 77). In connection with this reaffirmation, X3J3 approved
the following responses to the public comments regarding the original recommendation.
Issue 1. Some government contracts require FORTRAN 77 (IBM, Unisys)
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X3J3 believes that this issue is now moot. FIPS validation is now rarely required for
government contracts, and NIST has indicated to X3J3 that it will continue to validate
Fortran compilers against its FORTRAN 77 validation suite. X3J3 is willing to assist
in resolving any technical issues that might arise in the validation of Fortran 90
compilers against the FORTRAN 77 validation suite.
Issue 2. There are more FORTRAN 77 products and applications than Fortran 90 ones (Unisys)
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Virtually all major vendors now offer Fortran 90 compilers. ÒFORTRAN 77 applicationsÓ
are also Fortran 90 applications, as FORTRAN 77 is a subset of Fortran 90, and hence
ÒFORTRAN 77 applicationsÓ can be used with Fortran 90 compilers.
Issue 3. Users have not converted to Fortran 90 - the costs donÕt justify the benefits (Unisys)
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ÒFORTRAN 77 codeÓ does not have to be converted to Fortran 90 - it already is Fortran 90.
Programmers can continue to code at the FORTRAN 77 level and still use the growing number
of increasingly robust and efficient Fortran 90 processors.
Sincerely,
Jerrold L. Wagener
X3J3 chair