The Institute of Jazz Studies (IJS) is the largest and most comprehensive library and archives of jazz and jazz-related materials in the world. It is located on the fourth floor of the John Cotton Dana Library at Rutgers University–Newark in Newark, New Jersey. The archival collection contains more than 100,000 sound recordings on CDs, LPs, EPs, 78- and 75-rpm disks, and 6,000 books. It also houses over 30 instruments used by prominent jazz musicians.