The U.S. Sheet Music Collection in the Music and Performing Arts Library at the University of Illinois contains about 100,000 titles of popular music (as well as some classical) from the early 19th century through the 1980s. The U.S. Sheet Music Collection is divided into two main categories: Vocal/piano music and solo piano music. The music is located in the Special Collections area on the second floor of MPAL and is designated for building-use only. It may not be checked out. Items may reviewed in the Library, or copied when items are in the public domain or when appropriate permissions have been obtained.