NAME
        Output -- Identify the programs' initial output file handle

    SYNOPSIS
        file = Output()
        D0

        bptr output(void)

    FUNCTION
        Output() is used to identify the initial output stream allocated
        when the program was initiated.  Never close the filehandle returned
        by Output().

    RESULTS
        file - BCPL pointer to a file handle

    SEE ALSO
        input()