000 - Computer science, information, general works 26,001 100 - Philosophy & psychology 18,588 200 - Religion 42,570 300 - Social sciences 130,871 400 - Language 26,399 500 - Natural sciences and mathematics 44,910 600 - Technology (Applied sciences) 45,949 700 - The arts 22,478 800 - Literature (Belles-lettres) and rhetoric 213,606 900 - History & geography 41,878