/sys$common/syshlp/helplib.hlb REPLY, Qualifiers, /DISABLE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /DISABLE[=(keyword[,...])]

    Requires OPER (operator) privilege. Requires OPER and SECURITY
    privileges for security messages.

    If the operator communication manager (OPCOM) is running,
    restores to normal (that is, nonoperator) status the terminal
    at which the command is entered. The /DISABLE qualifier cannot
    be entered from a batch job. To restrict the types of messages
    displayed on an operator's terminal, specify one of the following
    keywords:

    CARDS              Inhibits messages sent to the card readers.

    CENTRAL            Inhibits messages sent to the central system
                       operator.

    CLUSTER            Inhibits messages from the connection manager
                       pertaining to cluster state changes.

    DEVICES            Inhibits messages pertaining to mounting
                       disks.

    DISKS              Inhibits messages pertaining to mounting and
                       dismounting disk volumes.

    LICENSE            Inhibits messages pertaining to software
                       licenses.

    NETWORK            Inhibits messages pertaining to networks;
                       the keyword CENTRAL must also be specified to
                       inhibit network messages.

    OPER1 to OPER12    Inhibits messages sent to operators identified
                       as OPER1 to OPER12.

    PRINTER            Inhibits messages pertaining to print
                       requests.

    SECURITY           Inhibits messages pertaining to security
                       events; requires SECURITY privilege.

    TAPES              Inhibits messages pertaining to mounting and
                       dismounting tape volumes.

    When an operator logs out from a remote or a dial-in terminal,
    the operator terminal is automatically disabled.