000 - Computer science, information & general works 19,771 100 - Philosophy & psychology 7,638 200 - Religion 1,715 300 - Social sciences 90,567 400 - Language 25,694 500 - Science 39,094 600 - Technology 79,397 700 - Arts & recreation 7,716 800 - Literature 33,557 900 - History & geography 18,843