000 - Computer science, information, general works 20,999 100 - Philosophy & psychology 10,504 200 - Religion 2,576 300 - Social sciences 68,778 400 - Language 6,245 500 - Natural sciences and mathematics 32,811 600 - Technology (Applied sciences) 81,401 700 - The arts 4,399 800 - Literature (Belles-lettres) and rhetoric 32,212 900 - History & geography 9,464