PROGRAM Keys
        WRITE (*, *) 'Abc', 1.23e-6, -456, 'xyz'
        WRITE (UNIT=*, FMT=*) 'Abc', 1.23e-6, -456, 'xyz'
        WRITE (UNIT=*, *) 'Abc', 1.23e-6, -456, 'xyz'
        WRITE (*, FMT=*) 'Abc', 1.23e-6, -456, 'xyz'
        WRITE (FMT=*, UNIT=*) 'Abc', 1.23e-6, -456, 'xyz'
        WRITE (*, UNIT=*) 'Abc', 1.23e-6, -456, 'xyz'
        WRITE (FMT=*, *) 'Abc', 1.23e-6, -456, 'xyz'
    END PROGRAM Keys