The reserve collection consists of professors' personal copies, departmental copies, library materials (print and non-print) and other materials prepared for reserve. Departments and professors provide the materials that are placed on reserve for their courses. Usage statistics are analyzed periodically and unused materials are returned to instructors or are removed from Reserve in the case of library material. A campus may limit the number of reserve items accepted per course due to space and staffing. Faculty is responsible for compliance with copyright laws for materials placed on reserve.