Beware! There are students who will use your account to print their material at the library. They innocently lurk nearby the print station and pounce on the screen while your account is still logged in and select their job. No kidding–they do this.
How to combat this? After you have selected your print job, immediately log off (the big circular icon in the lower left-hand corner of the screen). Just click that icon and you’re done. So are they, for that matter.