The zither is a musical string instrument, most commonly in Slovenia, Austria, Hungary, the southern regions of Germany, alpine Europe an East Asian cultures. The term "citre" is also used more broadly, to describe the entire family of stringed instruments in which the strings do not extend beyond the sounding box, including the hammered dulcimer, psaltery, Appalachian dulcimer, kantele, guzheng, koto, gayageum, đàn tranh, kanun, autoharp, piano, harpsichord, santur, swarmandal, and others.