000 - Computer science, information & general works 3,591 100 - Philosophy & psychology 672 200 - Religion 334 300 - Social sciences 21,230 400 - Language 425 500 - Science 3,284 600 - Technology 9,332 700 - Arts & recreation 588 800 - Literature 1,175 900 - History & geography 1,567 [Unassigned] 4