K. (Köchel number)

The Köchel number (K., or Kölchel number) is a cataloging system used to identify, organize, and reference the works of composer Wolfgang Amadeus Mozart. Created by Ludwig von Köchel in the 19th century, it assigns a unique chronological number to each of Mozart's compositions, starting with his earliest works. This system helps musicians, scholars, and enthusiasts locate and study Mozart’s compositions efficiently, offering a chronological framework that reflects the order in which his music was composed or cataloged.