000 - Computer science, information, general works 25,807 100 - Philosophy & psychology 18,436 200 - Religion 42,383 300 - Social sciences 129,716 400 - Language 26,252 500 - Natural sciences and mathematics 44,756 600 - Technology (Applied sciences) 45,745 700 - The arts 22,297 800 - Literature (Belles-lettres) and rhetoric 211,806 900 - History & geography 41,640