VMS Help LOGOUT, Qualifiers  *Conan The Librarian (sorry for the slow response - running on an old VAX)

1 - /BRIEF

    Prints a brief logout message (process name, date, and time) or a
    full logout message (a brief message plus accounting statistics).

2 - /FULL

    Requests the long form of the logout message. When you specify
    the /FULL qualifier, the command interpreter displays a summary
    of accounting information for the terminal session. The default
    qualifier for a batch job is /FULL.

3 - /HANGUP

       /HANGUP
       /NOHANGUP

    Determines, for dialup terminals, whether the phone hangs up
    whenever you log out. By default, the setting of the /HANGUP
    qualifier for your terminal port determines whether the line
    is disconnected. Your system manager determines whether you are
    permitted to use this qualifier.