Danny Tan wrote:
>Why is Mozart's work starts with K--- instead of Op---? Are there any
>particular reason why he is special?
Indeed. Mozart's works were never assigned opus numbers by publishers. In
fact, if memory serves, he didn't see a great deal of his music published
in his lifetime. The K stands for Koechel, who was the 19th century
musicologist that catalogued Mozart's work.
Kevin Sutton