1      From time to time you may find that you are dropped from the computer
 2 even though you haven't chosen to "log out." There are three reasons why this
 3 happens: the computer fails; you are preempted; you remain inactive for too
 4 long.
 5 
 6      There are two ways in which the computer fails: there are problems with
 7 Multics itself; there are problems with the communications channel.  When the
 8 former occurs, the message MULTICS NOT IN OPERATION is usually printed.  Then
 9 you must wait until Multics is back in operation and log in again.  When the
10 latter occurs, you may simply be interrupted with the message that normally
11 prompts you to make the connection.  In this case, you can log in as usual and
12 pick up where you were interrupted.
13 
14      On occasion you may be preempted because there are too many users on
15 Multics.  In this case, you will be notified in advance.  You can either log
16 out or be logged out automatically.
17 
18      When you remain inactive for a while, 25 minutes or so, you will also be
19 told that you will be logged out in a few minutes.  If you become active, the
20 automatic log out will be cancelled.  Otherwise, you will be logged out
21 automatically.