History 26 History and criticism 13 Philosophy 10 Flow charting 7 Politics and government 7 Women 7 Charts, diagrams, etc 6 Social aspects 6 Economic conditions 5 Economic policy 5 Feminism 5 Information visualization 5 Literature and society 5 Mathematics 5 Social sciences 5 Visual communication 5 Blacks in literature 4 Economic development 4 Economic history 4 English literature 4 Flow charts 4 Gatt bar charts 4 Human molecular genetics 4 LAW / International 4 Literature 4 Literature and history 4 Oceanography 4 Social conditions 4 Sociology 4 Statistics 4