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Columbia Records is an American record label, owned by Japan's Sony Music Entertainment, operating under the Columbia Music Group with Aware Records. It was founded in 1888, evolving from an earlier enterprise, the American Graphophone Company—successor to the Volta Graphophone Company.... Columbia is the oldest brand name in pre-recorded sound, being the first record company to produce pre-recorded records as opposed to blank cylinders. Columbia Records went on to release records by an array of notable singers, instrumentalists, and bands. From 1961 to 1990, its recordings were released outside the U.S. and Canada on the CBS Records label before adopting the Columbia name in most of the world. Until 1989, Columbia Records had no connection to Columbia Pictures, which used various other names for record labels they owned, including Colpix and later Arista; rather, it was connected to the original owner, CBS, which stood for Columbia Broadcasting System.
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The Island Def Jam Music Group is an umbrella label formed in 1999 when Universal Music Group merged two of its daughter companies, Island Records and Def Jam Recordings, to create a label group. In 2011, Motown Records was split from the Universal Motown Republic Group and subsequently merged into... the The Island Def Jam Music Group. Barry Weiss serves as Chairman & CEO of the company. The Island Def Jam Music Group was formed in 1999 when Universal Music Group merged two of its daughter companies, Island Records and Def Jam Recordings, as a result of the merger between Universal Music and PolyGram labels. Also incorporated into the venture was the staff, roster, and back catalog of Mercury Records, which was dismantled for several years until it was revived as a new venture in 2007. Meanwhile, the labels Island Records and Def Jam Recordings continue to operate as their own respective labels as a part of the Island Def Jam Music Group umbrella . The company is also affiliated with Lost Highway Records.
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Def Jam Recordings is an American hip-hop record label, owned by Universal Music Group, and operates as a part of The Island Def Jam Music Group. In the UK, the label takes on the name Def Jam UK and is operated through Mercury Music Group, while in Japan, it is Def Jam Japan operating through Universal Sigma Music.

Pop music is a genre of popular music which originated in its modern form in the 1950s, deriving from rock and roll. The terms popular music and pop... music are often used interchangeably, even though the former is a description of music which is popular , whilst the latter is a specific genre containing qualities of mass appeal. As a genre, pop music is very eclectic, often borrowing elements from other styles including urban, dance, rock, Latin and country; nonetheless, there are core elements which define pop. Such include generally short-to-medium length songs, written in a basic format , as well as the common employment of repeated choruses, melodic tunes, and catchy hooks. So-called "pure pop" music, such as power pop, features all these elements, utilising electric guitars, drums and bass for instrumentation; in the case of such music, the main goal is usually that of being pleasurable to listen to, rather than having much artistic depth.
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Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has... its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music. Rock music also drew strongly on a number of other genres such as blues and folk, and incorporated influences from jazz, classical and other musical sources. Musically, rock has centered around the electric guitar, usually as part of a rock group with bass guitar and drums. Typically, rock is song-based music usually with a 4/4 time signature utilizing a verse-chorus form, but the genre has become extremely diverse and common musical characteristics are difficult to define. Like pop music, lyrics often stress romantic love but also address a wide variety of other themes that are frequently social or political in emphasis. The dominance of rock by white, male musicians has been seen as one of the key factors shaping the themes explored in rock music. Rock places a higher degree of emphasis on musicianship, live performance, and an ideology of authenticity than pop music.
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Rhythm and blues, often abbreviated to R&B and RnB, is a genre of popular African-American music that originated in the 1940s. The term was... originally used by record companies to describe recordings marketed predominantly to urban African Americans, at a time when "urbane, rocking, jazz based music with a heavy, insistent beat" was becoming more popular. The term has subsequently had a number of shifts in meaning. In the early 1950s, the term rhythm and blues was frequently applied to blues records. Starting in the mid-1950s, after this style of music contributed to the development of rock and roll, the term "R&B" became used to refer to music styles that developed from and incorporated electric blues, as well as gospel and soul music. By the 1970s, rhythm and blues was used as a blanket term for soul and funk. In the 1980s, a newer style of R&B developed, becoming known as "Contemporary R&B". Jerry Wexler of Billboard magazine coined the term "rhythm and blues" in 1948 as a musical marketing term in the United States. It replaced the term "race music", which originally came from within the black community, but was deemed offensive in the postwar world.
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