Paranoid is the second studio album by the English rock band Black Sabbath. Released in September 1970, it was the band's only LP to top the UK Albums Chart until the release of 13 in 2013. Paranoid contains several of the band's signature songs, including "Iron Man", "War Pigs" and "Paranoid". It is often cited as an influential album in the development of heavy metal music.
Black Sabbath is considered by many to be the first heavy metal band, Black Sabbath was formed in 1968. The band's original name was the Polka Tulk Blues Band (later shortened to Polka Tulk) and later Earth before becoming Black Sabbath. The original line-up lasted until 1979, after which Osbourne was fired and replaced by Ronnie James Dio.