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
S. Balakrishnan (composer) (1992), and "Ishttamanu Nooruvattam" (1996). After "Vietnam Colony", Balakrishnan took a break and did only rerecording for a few films. He made a comeback through East Coast Vijayan's 2011 musical romance film "Mohabbath". He is currently a faculty for recorder and western flute at KM Music Conservatory, a music institution founded by A. R. Rahman . S. Balakrishnan (composer) S. Balakrishnan is an Indian film score composer and music director who works mainly in Malayalam cinema. Best known for his association with the director duo Siddique-Lal, he has scored some of the all-time hit songs in late eighties and early