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. Chithra composer A. R. Rahman for his Tamil film songs.. Her fifth National award for best singer was for the song "Oooh La La" from the film "Minsara Kanavu" (1997). Chithra started her journey in Kannada cinema through the film Preethi released in 1986. The duet song "Nee Hacchida Ee Kumkuma" along with S. P. Balasubrahmanyam was composed by G. K. Venkatesh. In the same year, composer M. Ranga Rao offered her two songs in the film Aruna Raaga. This was followed by "Sheela O My Sheela", a duet song with K. J. Yesudas and composed by Bappi Lahiri for the