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
Rogers Locomotive and Machine Works numbers are listed, they are given in chronological order for the locomotives; all locations are in the United States unless noted. Rogers Locomotive and Machine Works Rogers Locomotive and Machine Works was a 19th-century manufacturer of railroad steam locomotives based in Paterson, in Passaic County, New Jersey, in the United States. It built more than six thousand steam locomotives for railroads around the world. Most railroads in 19th-century United States rostered at least one Rogers-built locomotive. The company's most famous product was a locomotive named "The General", built in December 1855, which was one of the principals of the Great