000 - Computer science, information, general works 266 100 - Philosophy & psychology 137 200 - Religion 93 300 - Social sciences 1,538 400 - Language 402 500 - Natural sciences and mathematics 559 600 - Technology (Applied sciences) 1,528 700 - The arts 135 800 - Literature (Belles-lettres) and rhetoric 610 900 - History & geography 236