000 - Computer science, information & general works 7,025 100 - Philosophy & psychology 6,253 200 - Religion 10,544 300 - Social sciences 23,682 400 - Language 3,667 500 - Science 10,889 600 - Technology 36,941 700 - Arts & recreation 18,490 800 - Literature 4,050 900 - History & geography 10,513