Opus number developed other catalogue-number systems; among them the "Bach-Werke-Verzeichnis" (BWV-number), and the "Köchel-Verzeichnis" (K- and KV -numbers) with which are organised the works of Johann Sebastian Bach and Wolfgang Amadeus Mozart, respectively. In the classical period, the Latin word "opus" ("work", "labour") was used to identify, list, and catalogue a work of art. By the 15th and 16th centuries, the word "opus" was used by Italian composers to denote a specific musical composition, and by German composers for collections of music. In compositional practise, numbering musical works in chronological order dates from 17th century Italy, especially Venice. In common usage, the
K. S. Raja K. S. Raja K. S. Raja (also spelled K. S. Rajah, , full name Kanagaratnam Sriskandarajah, "கனகரத்தினம் ஸ்ரீஸ்கந்தராஜா", 8 February 1942 - 3 September 1994) was a very popular Radio Ceylon radio announcer from Sri Lanka. He was popular with his audiences in both Sri Lanka and in Tamil Nadu in India. During the course of the Sri Lankan civil war, he was killed by EPDP given poison in 1996 He was born in a town called Theldeniya (see here) in the [Kandy District to upper class minority Sri Lankan Tamil parents and grew up in Kotatadi, Jaffna. His father