000 - Computer science, information, general works 720 100 - Philosophy & psychology 160 200 - Religion 62 300 - Social sciences 6 268 400 - Language 157 500 - Natural sciences and mathematics 408 600 - Technology (Applied sciences) 4 382 700 - The arts 23 800 - Literature (Belles-lettres) and rhetoric 224 900 - History & geography 44