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Annotation of 40BSD/cmd/apl/documents/I-beams, revision 1.1

1.1     ! root        1: New I-beams:
        !             2: 
        !             3:        1I'file name'           -Switch input to 'file name'.
        !             4:        1I0                     -Switch input back to the terminal.
        !             5: 
        !             6:        2I'file name'           -Switch output to 'file name'.
        !             7:        2I0                     -Switch output back to the terminal.
        !             8: 
        !             9:        3I'file name'           -Switch output to 'file name'. If the
        !            10:                                 file exists, append to it.
        !            11:        3I0                     -Switch output back to the terminal.
        !            12: 
        !            13:        10I 'UNIX command'      -Execute the command as if it were
        !            14:                                 typed in to UNIX.
        !            15: 
        !            16: In the above examples, the zero could have also been a null vector.
        !            17: 
        !            18: Example:
        !            19: 
        !            20:        If OUTPUTFILE is a character vector which contains a file name,
        !            21: the file could be printed by the command:
        !            22: 
        !            23:        10I'pr -l64 ',OUTPUTFILE,' | opr -lp'

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