Directs BACKUP to process files in a manner suitable for data
    interchange (software distribution) by excluding information that
    would prevent other utilities or sites from reading the BACKUP
    save set.

    The /INTERCHANGE qualifier implies /CONVERT when the input is
    an ODS-5 disk or file. (You can also specify /NOCONVERT with the
    /INTERCHANGE qualifier.)

    The effects of the /INTERCHANGE qualifier are as follows:

    o  Directories not selected as files are not copied.

    o  Access control lists are not copied.

    o  Block size on magnetic tape is limited to 8192 bytes.

    o  Normal error recovery is used to write magnetic tapes so that
       no bad records exist on the resulting magnetic tape.