Liner notes (also sleeve notes or album notes) are the writings found on the sleeves of LP record albums and in booklets that come inserted into the compact disc jewel case or cassette j-cards. Liner notes are descended from the program notes for musical concerts, and developed into notes that were printed on the outer album jacket or the inner sleeve used to protect a traditional 12-inch vinyl record, i.e., long playing or gramophone record album. The term descends from the name "record liner" or "album liner". Album liner notes survived format changes from vinyl LP to cassette to CD. These notes can be sources of information about the contents of the recording as well as broader cultural topics. Such notes often contained a mix of factual and anecdotal material, and occasionally a discography for the artist or the issuing record label. Liner notes were also an occasion for thoughtful signed essays on the artist by another party, often a sympathetic music journalist, a custom that has largely died out. However, the liner note essay has survived in reissues and retrospective compilations, particularly in box sets. It is also a tradition in Japan, especially for foreign artist releases. Liner notes often include complete song lyrics for the album. Liner notes now usually include information about the musician, lyrics, a personnel list, and other credits to people the musicians want to thank and people or companies involved in the production of the music. They also can give details on the extent of each musical piece, and sometimes place them in historical or social context. Liner notes for classical music recordings often provide information in several languages; if the piece includes vocal parts, they will often include a libretto, possibly also translated into several languages. The factual information in liner notes comes from the Label Copy. Label Copy is the record label's official info sheet for the published release.