000 - Computer science, information, general works 4 416 100 - Philosophy & psychology 8 736 200 - Religion 13 462 300 - Social sciences 63 319 400 - Language 4 979 500 - Natural sciences and mathematics 8 214 600 - Technology (Applied sciences) 12 276 700 - The arts 13 679 800 - Literature (Belles-lettres) and rhetoric 23 017 900 - History & geography 22 770