000 - Computer science, information, general works 18 900 100 - Philosophy & psychology 9 545 200 - Religion 2 386 300 - Social sciences 61 182 400 - Language 4 691 500 - Natural sciences and mathematics 28 672 600 - Technology (Applied sciences) 75 396 700 - The arts 3 187 800 - Literature (Belles-lettres) and rhetoric 21 449 900 - History & geography 8 123