000 - Computer science, information, general works 18.900 100 - Philosophy & psychology 9.545 200 - Religion 2.386 300 - Social sciences 61.182 400 - Language 4.691 500 - Natural sciences and mathematics 28.672 600 - Technology (Applied sciences) 75.396 700 - The arts 3.187 800 - Literature (Belles-lettres) and rhetoric 21.449 900 - History & geography 8.123