ISQL sessions

Where or where does the system store your sessions, not the ones you save to
a source member, but your current session after you exit.  For instance I
start three interactive jobs and I start an ISQL session in each.  After
exiting all three, in which one has the update statement I want, were does
or how does the system save these?  Is the first ISQL session saved as user
session1, the second as user session2, the third as user session3?  Or is
based on User/Job for each interactive user.

I have a programmer that cannot keep track of where he was but has a hard
time finding that statement he build before lunch.

Second, can I limit them to one ISQL session?  (Management override to solve
confused programmer ;-)

Christopher K. Bipes 
Manager of Systems Administration
CrossCheck, Inc.