VMS Help SORT, Specification File Qualifiers, /WORK_FILES, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /WORK_FILES=("WRKD$:")

      This example of a /WORK_FILES qualifier assigns one of Sort's
      work files to the device WRKD$: because that device has the
      most space available.