/sys$common/syshlp/helplib.hlb FORTRAN, Logical Names, FOR$PRINT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  If defined during execution, 'FOR$PRINT' is used instead of
  'SYS$OUTPUT' as the file specification for the implicit Fortran
  logical unit used for PRINT statements and WRITE statements that
  specify * as the unit number.