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Keyboard works (Klavierwerke) by Johann Sebastian Bach traditionally refers to Chapter 8 in the BWV catalogue or the fifth series of the New Bach Edition, both of which list compositions for a solo keyboard instrument like the harpsichord or the clavichord. Despite the fact that the organ is also a keyboard instrument, and that in Bach's time the distinction wasn't always made whether a keyboard composition was for organ or another keyboard instrument, Wolfgang Schmieder ranged organ compositions in a separate section of the Bach-Werke-Verzeichnis (Nos. 525-771). Also other compositions for keyboard, like compositions for lute-harpsichord and fortepiano were listed outside the "Klavierwerke" range by Schmieder. Lute works are in the range 995–1000, Chapter 9 in the BWV catalogue.