VMS Help FORTRAN, /PARALLEL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /[NO]PARALLEL=(option[,...])     D=/PARALLEL=(NOAUT,NOMAN) or /NOPAR

  Controls whether the compiler performs special processing for
  parallel-processing applications.

  Specifying /NOPARALLEL or /PARALLEL=(NOAUTOMATIC,NOMANUAL) has the
  same effect as omitting the /PARALLEL qualifier.  Compiler
  directives relating to parallel processing (CONTEXT_SHARED,
  DO_PARALLEL, LOCKON, LOCKOFF, PRIVATE, and SHARED) are treated as
  comments and no object code is generated to support execution of
  parallel DO loops.

  Specifying /PARALLEL without any options has the same effect as
  specifying /PARALLEL=(MANUAL,AUTOMATIC).

  Additional Information (explode) :

• AUTOMATIC
• MANUAL
• ALL
• NONE