The album The Dark Side of the Moon by the British progressive rock band Pink Floyd entered the Billboard Top LPs & Tape chart, on which it spent a record 942 weeks.

The Dark Side of the Moon is the eighth studio album by the English rock band Pink Floyd, released on 1 March 1973 by Capitol Records in the US and on 16 March 1973 by Harvest Records in the UK. Developed during live performances before recording began, it was conceived as a concept album that would focus on the pressures faced by the band during their arduous lifestyle, and also deal with the mental health problems of the former band member Syd Barrett, who had departed the group in 1968. New material was recorded in two sessions in 1972 and 1973 at EMI Studios in London.

Progressive rock is a broad genre of rock music that primarily developed in the United Kingdom through the mid- to late 1960s, peaking in the early-to-mid-1970s. Initially termed "progressive pop", the style emerged from psychedelic bands who abandoned standard pop or rock traditions in favour of instrumental and compositional techniques more commonly associated with jazz, folk, or classical music, while retaining the instrumentation typical of rock music. Additional elements contributed to its "progressive" label: lyrics were more poetic, technology was harnessed for new sounds, music approached the condition of "art", and the studio, rather than the stage, became the focus of musical activity, which often involved creating music for listening rather than dancing.

Pink Floyd are an English rock band formed in London in 1965. Gaining an early following as one of the first British psychedelic groups, they were distinguished by their extended compositions, sonic experiments, philosophical lyrics, and elaborate live performances, and became a leading progressive rock band.

The Billboard 200 is a record chart ranking the 200 most popular music albums and EPs in the United States. It is published weekly by Billboard magazine to convey the popularity of an artist or groups of artists. Sometimes, a recording act is remembered for its "number ones" that outperformed all other albums during at least one week. The chart grew from a weekly top 10 list in 1956 to become a top 200 list in May 1967, acquiring its existing name in March 1992. Its previous names include the Billboard Top LPs (1961–1972), Billboard Top LPs & Tape (1972–1984), Billboard Top 200 Albums (1984–1985), Billboard Top Pop Albums (1985–1991), and Billboard 200 Top Albums (1991–1992).