DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   SIFT
      SHARE Internal Fortran Translator.  Translation utility
      designed for converting Fortran II to Fortran IV.  The word
      "sift" was often used as a verb to describe converting code
      from one language to another.  Sammet 1969, p.153.