Politics and government 265 History 197 European federation 157 Foreign relations 102 Federal government 91 Economic conditions 68 Economic integration 54 Social conditions 38 Economic policy 32 Political aspects 32 Post-communism 27 Nationalism 25 Social aspects 25 National security 21 Banks and banking 19 Federal Reserve banks 19 Democracy 18 Monetary policy 18 Political culture 18 Computer networks 17 Design and construction 17 Management 16 Study and teaching 16 Data processing 15 Finance 15 Purification 15 Sewage 15 Physiological aspects 14 Relations 14 European Union 13