000 - Computer science, information, general works 1,027 100 - Philosophy & psychology 2,912 200 - Religion 973 300 - Social sciences 18,741 400 - Language 667 500 - Natural sciences and mathematics 1,405 600 - Technology (Applied sciences) 4,032 700 - The arts 2,754 800 - Literature (Belles-lettres) and rhetoric 4,789 900 - History & geography 3,725