The untitled fourth album by English rock band Led Zeppelin was released on 8 November 1971. No official title is printed on the album, but it is generally referred to as Led Zeppelin IV, following the naming standard used by the band's first three studio albums. The album has alternatively been referred to as Four Symbols, Zoso.svg, The Fourth Album, Sticks, ZoSo, Untitled, The Hermit, Runes, or simply, IV. Upon its release, Led Zeppelin IV was a huge commercial and critical success. The album is one of the best-selling albums in history at 37 million units. It has shipped over 23 million units in the United States alone, putting it third on the all-time list. In 2003, the album was ranked 66th on Rolling Stone magazine's list of the 500 greatest albums of all time.