The Open Content Alliance is a collaborative effort of a group of cultural, technology, nonprofit, and governmental organisations from around the world that are building a permanent archive of multilingual digitised text and multimedia content. An archive of contributed material is available through this website and through Yahoo! and other search engines and sites. The participating organisations include the Biodiversity Heritage Library (including the Royal Botanic Gardens, Kew and the Natural History Museum), many American universities, Yahoo!, the Prelinger Archives, and the National Archives (UK).