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

  Each Fortran line has the following four fields:

     Statement label field           Columns 1-5
     Continuation indicator field    Column 6
     Statement field                 Columns 7-72 (if you specify
                                       /EXTEND_SOURCE or
                                       OPTIONS/EXTEND_SOURCE,
                                       statements extend to
                                       column 132)
     Sequence number field           Columns 73-80

  There are two ways to code a Fortran line:  standard formatting and
  tab formatting.  You may prefer to use standard formatting when
  program portability to other systems is necessary.  The tab
  formatting method is convenient when you are entering lines at a
  terminal with a text editor.

  Additional Information (explode) :

• Standard
• Tab