The ESTC is designed to include a bibliographic record, with holdings, of every surviving copy of letterpress produced in Great Britain or any of its colonies, in any language, worldwide, from 1473-1800. In order to increase access to these items, it includes references to microfilm, digital, and other facsimile versions. All of its records are fully searchable online. The ESTC is the joint effort of the British Library, the American Antiquarian Society, the ESTC/NA, and our many contributing libraries throughout the world.