000 - Computer science, information, general works 698 100 - Philosophy & psychology 154 200 - Religion 59 300 - Social sciences 5,595 400 - Language 149 500 - Natural sciences and mathematics 369 600 - Technology (Applied sciences) 3,471 700 - The arts 22 800 - Literature (Belles-lettres) and rhetoric 145 900 - History & geography 36