000 - Computer science, information, general works 81,840 100 - Philosophy & psychology 30,915 200 - Religion 27,447 300 - Social sciences 229,133 400 - Language 21,696 500 - Natural sciences and mathematics 154,640 600 - Technology (Applied sciences) 184,481 700 - The arts 22,321 800 - Literature (Belles-lettres) and rhetoric 162,283 900 - History & geography 64,906