300 - Social sciences 226,914 600 - Technology 183,958 800 - Literature 160,465 500 - Science 154,292 000 - Computer science, information & general works 81,622 900 - History & geography 63,960 100 - Philosophy & psychology 30,254 200 - Religion 27,132 700 - Arts & recreation 22,213 400 - Language 21,578