Displays a message at a system operator's terminal and optionally
    requests a reply. All messages are logged at the operator's
    console and in the operator's log file, if that file is
    initialized.

    To use this command, you must start the operator communication
    process (OPCOM) at boot time by specifying the DCL command
    @SYS$SYSTEM:STARTUP OPCOM in the site-specific startup command
    file, SYS$MANAGER:SYSTARTUP.COM.

    Format

      REQUEST  message-text