The acronym DRM stands for Digital Rights Management. That term refers to technologies that permit copyright holders to prevent the copying or misuse digital content, such as ebooks, music files or software.
Some ebooks purchased by libraries from publishers will self destruct after a certain number of checkouts. Then the library must purchase another copy to again circulate that book. The DRM Chair, designed by Les Sugus at the University of Art and Design at Lusanne, Switzerland, works on the same concept. After the chair has been sat upon 8 times, electrical wires burn through the wax at the joints, causing the structure to fall over.