000 - Computer science, information, general works 473 100 - Philosophy & psychology 994 200 - Religion 240 300 - Social sciences 1,462 400 - Language 124 500 - Natural sciences and mathematics 242 600 - Technology (Applied sciences) 160 700 - The arts 236 800 - Literature (Belles-lettres) and rhetoric 163 900 - History & geography 251