OK Computer is the third album by the English rock band Radiohead, released in 1997. It reached #1 on the UK Albums Chart and marked Radiohead's highest entry into the American market at the time, where it debuted at #21. OK Computer expanded the band's worldwide popularity, becoming the last Radiohead album to have a delayed release outside of the United Kingdom. As of 2007, it has been certified triple platinum in the UK and double platinum in the US. OK Computer included the singles "Paranoid Android", "Karma Police" and "No Surprises".