I'm sure you've all had this question at the desk before. Can I print on both sides? Not on library printers, but I just discovered that students can print double-sided in 103 Walter. A student in 103 explained to me that the default is single-sided printing, but they can switch to double-sided in the print menus.
File > Print > Preferences (or Properties), then change "Print on Both Sides:" to "Yes, Flip Over."