CONVERT = fm

  fm  Is a character scalar memory reference that is assigned
      one of the following values:

  'LITTLE_ENDIAN':  If the file is open with little endian
                    integer and IEEE floating-point data
                    conversion in effect.

  'BIG_ENDIAN':     If the file is open with big endian
                    integer and IEEE floating-point data
                    conversion in effect.

  'CRAY':           If the file is open with big endian
                    integer and CRAY floating-point data
                    conversion in effect.

  'FDX':            If the file is open with little endian
                    integer and VAX F_floating, D_floating,
                    and IEEE X_floating data conversion in
                    effect.

  'FGX':            If the file is open with little endian
                    integer and VAX F_floating, G_floating,
                    and IEEE X_floating data conversion in
                    effect.

  'IBM':            If the file is open with big endian
                    integer and IBM System\370 floating-
                    point data conversion in effect.

  'VAXD':           If the file is open with little endian
                    integer and VAX F_floating, D_floating,
                    and H_floating data conversion in effect.

  'VAXG':           If the file is open with little endian
                    integer and VAX F_floating, G_floating,
                    and H_floating data conversion in effect.

  'NATIVE':         If the file is open with no data
                    conversion in effect.

  'UNKNOWN':        If the file or unit is not connected
                    for unformatted I/O.