How do I turn off user timeout

From: DonC (donald_cooley_at_dell.com)
Date: 10/30/04 

Date: Sat, 30 Oct 2004 08:31:01 -0700

I want the system to leave the user logged in indefinitely and cannot find
how to change the timeout setting. It is logging users off after only a
minute or so of inactivity and driving them crazy.