DELIM = del

  del  Is a scalar default character variable that is assigned
       one of the following values:

  'APOSTROPHE'  If apostrophes are used to delimit character
                constants in list-directed and namelist output

  'QUOTE'       If quotation marks are used to delimit character
                constants in list-directed and namelist output

  'NONE'        If no delimiters are used

  'UNDEFINED'   If the file is not connected, or is not connected
                for formatted data transfer