What does bc j37 from js bach's toccata and fugue in d minor bwv 565 bc j37 mean?

BC J37 refers to the cataloging system used by musicologist Wolfgang Schmieder, which organizes works by Johann Sebastian Bach. In this system, Toccata and Fugue in D minor, BWV 565, is assigned the number J37. The "BWV" stands for Bach Werke Verzeichnis, which translates to "Bach Works Catalogue," indicating it is one of Bach's most famous organ compositions, often noted for its dramatic and powerful opening.