A Fortran line is divided into fields for the required information.
  Each column represents a single character.

   COLUMN    FIELD
   ------    -----
       1     Indicator: Comment(C,c,*,!,blank) or Debug(D,d)
     1-5     Label (any decimal integer except zero)
       6     Indicator: Continuation of statement (any character
                   except zero or space)
    7-72     Statement Field (up to column 72)
   73-80     Sequence Number (optionally to column 132 -- ignored)

                                 NOTE

          This source format is obsolescent  in  Fortran  95.
          HP  Fortran  flags  obsolescent  features,  but
          fully supports them.