The Internet Archive is a non-profit digital library with the stated mission of "universal access to all knowledge." A vast majority of the content on The Public Domain Review is sourced from its enormous archives of books, films and audio material. Many institutions from all over the world use the Internet Archive to house and provide access to their material. There is a default general non-commercial "Terms of Use" statement in operation in the site but it is overridden should the institution, digitising sponsor, or individual uploader make a statement to the contrary on the site. Many institutions - such as the California Digital Library, The Royal Society, and University of Toronto Libraries - have done so and so have openly licensed digital copies on the site. (Wikipedia)