Indicates whether the file is being connected for formatted,
  unformatted, or binary data transfer.  It takes the following form:

  FORM = ft

  ft  Is a character expression with one of the following
      values:

    'FORMATTED'         Formatted *DEFAULT FOR SEQUENTIAL ACCESS*
    'UNFORMATTED'       Unformatted *DEFAULT FOR KEYED
                          AND DIRECT ACCESS*
    'BINARY'            Binary