000 - Computer science, information & general works 4,260 100 - Philosophy & psychology 9,496 200 - Religion 11,827 300 - Social sciences 41,948 400 - Language 2,178 500 - Science 18,141 600 - Technology 14,032 700 - Arts & recreation 97 800 - Literature 50,169 900 - History & geography 32,201