000 - Computer science, information, general works 25,879 100 - Philosophy & psychology 18,482 200 - Religion 42,457 300 - Social sciences 130,137 400 - Language 26,305 500 - Natural sciences and mathematics 44,807 600 - Technology (Applied sciences) 45,809 700 - The arts 22,340 800 - Literature (Belles-lettres) and rhetoric 212,429 900 - History & geography 41,705