The Cecil H. Green Library (commonly known as Green Library) is the main library on the Stanford University campus and is part of the SUL system. It is named for Cecil H. Green. Green Library houses 4 million volumes, most of which are related to the humanities and social sciences. Libraries elsewhere on campus cover specialized areas such as Business, Law, Art, Medicine, or Engineering. Books from Green and other Stanford libraries are being scanned as part of the Google Books project.