What does the arrow <== mean on D APPL=applname

Document ID : KB000073865
Last Modified Date : 23/03/2018
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Question:
What does <== mean on D APPL=appl ?

  User       Terminal    
@userA <==A55TG001 
@userB       **NONE**
Answer:
<== between User and Terminal on Application Detail Display (TEN0203) indicates that the session is currently active. 

When the record does not have <== , the session is inactive.
 
User       Terminal    
@userA <==A55TG001 
@userB       **NONE**
A session of user @userA  on Terminal A55TG001 is active.

A session of user @userB has no terminal. The session was terminated without application logoff, like cutting off the terminal.