Logs a user off the database.
TCL-I command.
OFF {(options}
L Causes workspace to be unlinked.
D Disconnects completely from 
the database, instead of just logging you off and returning you to the Logon Please:  
prompt.
The D option is only applicable when the Reality user environment was started using the reality -U option. See comments below.
The OFF command logs you off the database and returns you to the point at which you logged on, except in certain circumstances when the D option is used. So, for example
If you entered reality  (without the
  –U option) at the host command prompt, you are 
  logged off and returned to the host command prompt.
If you used telnet on a Windows host to connect to a remote database, you are logged off and the telnet link is disconnected.
On a UNIX host, if you ran reality -U, either at the UNIX 
shell or from .profile with exec, you entered the database from the 
database's Logon Please prompt. When you log off, you are returned to the 
database's Logon Please  prompt.
In this case, if you execute OFF with the D option, 
instead of returning to the Logon Please  prompt, you are disconnected from the 
database completely and returned either to the UNIX shell, if the reality 
command was 
entered from there, or to the UNIX login or terminal server prompt, if 
the reality command was run with exec from the .profile script.