000 - Computer science, information & general works 4,272 100 - Philosophy & psychology 9,502 200 - Religion 11,833 300 - Social sciences 41,974 400 - Language 2,178 500 - Science 18,161 600 - Technology 14,067 700 - Arts & recreation 82 800 - Literature 50,188 900 - History & geography 32,226