What if you're on shared system like a school computer and you want to be able to log into the same session in different classrooms? Most systems have a single

What if you're on shared system like a school computer and you want to be able to log into the same session in different classrooms? Most systems have a single human user anyway and there is no need for them to log out. For systems that have multiple users it seems more convenient to be able to pick up where you left off.