History 294 Mathematical models 100 Data processing 86 Politics and government 66 Mathematics 56 Management 38 Design and construction 32 World War, 1939-1945 32 Foreign relations 31 Social aspects 30 Social conditions 29 Materials 28 Philosophy 28 Jews 27 Stochastic processes 26 Addresses, essays, lectures 25 Environmental aspects 24 Fluid dynamics 24 Industrial applications 23 Political aspects 23 Berlin Wall, Berlin, Germany, 1961-1989 22 Holocaust, Jewish (1939-1945) 22 Mathematical physics 22 Automatic control 21 Design 21 English language 21 Information technology 21 Nonlinear theories 21 Robotics 21 Architecture 20