OK Computer is the third studio album by Radiohead, released on 16 June 1997 on Parlophone. OK Computer reached number-one on the UK Albums Chart and marked Radiohead's highest entry into the American market at the time, debuting at number 21 on the Billboard 200. The album expanded the band's worldwide popularity, and has been certified triple platinum in the UK and Canada, double platinum in the US and platinum in Australia. In early 1998, OK Computer topped a Q reader's poll of the greatest albums of all time, and in 2001 Q placed it at number one in a list of the top 50 pop albums of the last 15 years. A number of publications, including NME, Melody Maker, Spin, Alternative Press, Pitchfork Media, and Time placed OK Computer prominently in lists of best albums of the 1990s or of all time. In 2003, the album was ranked number 162 on Rolling Stone magazine's list of the 500 greatest albums of all time.