000 - Computer science, information, general works 18 851 100 - Philosophy & psychology 9 541 200 - Religion 2 385 300 - Social sciences 61 157 400 - Language 4 683 500 - Natural sciences and mathematics 28 679 600 - Technology (Applied sciences) 75 245 700 - The arts 3 176 800 - Literature (Belles-lettres) and rhetoric 21 373 900 - History & geography 8 110