The Science Museum has a dedicated library, and until the 1960s was Britain's National Library for Science, Medicine and Technology. It holds runs of periodicals, early books and manuscripts, and is used by scholars worldwide. It has for a number of years been run in conjunction with the Library of Imperial College, but in 2007 the Library was divided over two sites. Histories of science and biographies of scientists are still kept at the Imperial College in London. The rest of the collection which includes original scientific works and archives are now located in Wroughton, Wiltshire.