People in Indiana know a fair bit about four-part harmony. For that matter, they know about all types of harmony, and this digital collection pays homage to their musical traditions. The IN Harmony Sheet Music collection was created as part of a partnership between the Indiana State Library, the University Lilly Library, the Indiana Historical Society, and the Indiana State Museum. The sheet music here includes music from 1800 to 1989, and visitors can browse these materials by name, title, year, instrumentation, genre, or subject. Browsing by subject is quite enjoyable, and some of the more curious topics include "Aging", "American Bison", "Sausages", and "Vice-Presidents". In addition, visitors can use the graphical interface on the homepage to pick out potential musical gems by their cover art. [KMG]