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. K. Pottekkatt 1982. (The last three volumes are a compilation of previous works) S. K. Pottekkatt Sankaran Kutty Pottekkatt (14 March 1913 – 6 August 1982), popularly known as S. K. Pottekkatt, is a famous Malayalam writer from Kerala state, South India. He is the author of nearly sixty books which include ten novels, twenty-four collections of short stories, three anthologies of poems, eighteen travelogues, four plays, a collection of essays and a couple of books based on personal reminiscences. Pottekkatt won the Kerala Sahitya Academy award of 1961 for the novel "Oru Theruvinte Katha" ("The Story of a Street") and the