Back catalog, also known as back catalogue, is a term often used in the music and publishing industry to refer to all the previously released works of a particular artist or company. However, there are several synonyms that can be used in place of back catalog, such as archives, collection, discography, repertoire, and library. These terms are not only used to describe a musician's previous works, but can also refer to a company's product offerings. For instance, a software company may describe their previous versions as their product archives or libraries. In summary, these synonyms illustrate the vast amount of work and extensive history a particular artist or company has produced over time.