/sys$common/syshlp/NCLHELP.HLB  —  Entity Hierarchy
    The top-level entities (and the layers to which they correspond) are:

    application                   _DNS_Clerk
                                 |_DNS_Server
                                 |_DTSS
                                 |_Event_Dispatcher
                                 |_Alias (OpenVMS)
                                 |_Loopback_Application
                                 |_X25_Client (OpenVMS)
                                 |_X25_Access
                                 |_X25_Relay (Alpha)
                                 |_X25_Server
                                 |_DSA
    session                      |_Session_Control
                                 |_OSAK
    transport                    |_NSP
                          Node---|_OSI_Transport
    network                      |_Routing
                                 |_X25_Protocol
    datalink                     |_XOT (OpenVMS Alpha)
                                 |_LAPB
                                 |_CSMA-CD
                                 |_LLC2
                                 |_MOP
                                 |_HDLC
                                 |_DDCMP (OpenVMS VAX)
                                 |_FDDI
                                 |_Modem_Connect
                                 |_Device
                                 |_Frame (OpenVMS)
                                 |_Token_Ring (Tru64 UNIX)

    Select an entity listed below for a description of that particular
    module and a listing of its subentities.  Or to quickly view the
    subentities beneath a particular module while at the NCL> prompt,
    type HELP ENTITY <module_name> SUBENTITIES.
Additional Information: explode extract
Node DNS Clerk DNS Server DSA DTSS Event Dispatcher Alias (OpenVMS) Session Control OSAK NSP OSI Transport Routing X25 Protocol X25 Access X25 Client (OpenVMS) X25 Relay (Alpha) X25 Server XOT (OpenVMS Alpha) LAPB CSMA-CD LLC2 MOP HDLC DDCMP (OpenVMS VAX) FDDI Modem Connect Device Frame (OpenVMS) Token Ring (Tru64 UNIX) Loopback Application
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