Crystal Reference provide content from our own extensive databases to some of the world's top publishers. Our most recent collaboration has been with Penguin Books for the New Penguin Encyclopedia, Factfinder and Concise Encyclopedia.

Crystal Reference content is widely used on some of the world's leading Internet sites, from biography.com to websterworld.com. Our materials are also used to enhance content services for mobile internet.

Crystal Reference also supply content for educational uses to schools worldwide and are registered content providers and retailers to the UK Curriculum Online scheme.

Crystal Reference is a division of Crystal Reference Systems Limited. Crystal Reference's sister division is Crystal Semantics, the developers of the world's first Sense Engine technology.

The company is chaired by Professor David Crystal, one of the world's leading experts on language and reference publishing. For more information on David and his work, please click here.