University Archives reminds all departments to follow the 2012 Retention Guide when going through old files. Many documents must be preserved for legal, administrative and historical purposes. Call S&T Archives for a paper retention guide at 341-6954 or go online. When you’ve determined what is safe to recycle, be sure to remove plastic overhead projector sheets, alligator clips, ring binders and plastic spirals. It only takes a few extra minutes, but your efforts will ensure that valuable paper is recycled instead of landfilled.