The fourth album by the English rock band Led Zeppelin was released on 8 November 1971. No title is printed on the album, so it is generally referred to as ''Led Zeppelin IV'', following the naming standard used by the band's first three studio albums. Also the album has alternatively been referred to as ', ''Four Symbols'' and ''The Fourth Album'' (both titles were used in the Atlantic Records catalogue), ''Untitled'', ''Runes'', ''Sticks'', ''ZoSo'', ''The Hermit'', and simply, ''IV''. Zoso is also the moniker for the band's guitarist, Jimmy Page.

Upon its release, ''Led Zeppelin IV'' was a 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. - Wikipedia