000 - Computer science, information, general works 18 861 100 - Philosophy & psychology 9 543 200 - Religion 2 386 300 - Social sciences 61 159 400 - Language 4 690 500 - Natural sciences and mathematics 28 670 600 - Technology (Applied sciences) 75 234 700 - The arts 3 185 800 - Literature (Belles-lettres) and rhetoric 21 411 900 - History & geography 8 121