000 - Computer science, information, general works 25,586 100 - Philosophy & psychology 18,176 200 - Religion 42,098 300 - Social sciences 126,795 400 - Language 26,104 500 - Natural sciences and mathematics 44,563 600 - Technology (Applied sciences) 45,493 700 - The arts 22,156 800 - Literature (Belles-lettres) and rhetoric 208,705 900 - History & geography 41,410