/OUTPUT[=filespec]
       /NOOUTPUT

    Controls where the output of the command is sent. By default,
    the output of the SHOW SYSTEM command is sent to the current
    SYS$OUTPUT device (usually your terminal). To send the output
    to a file, use the /OUTPUT qualifier followed by a file
    specification.

    The file specification may not include the asterisk (*)  and the
    percent sign (%)  wildcard characters. If you enter a partial
    file specification (for example, specifying only a directory),
    SHOW is the default file name and .LIS is the default file type.

    If you enter the /NOOUTPUT qualifier, output is suppressed.