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Annotation of 40BSD/cmd/apl/documents/I-beams, revision 1.1.1.1

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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