History 51 Juvenile literature 23 World War, 1939-1945 17 Terrorism 15 Military art and science 11 Management 10 Success 9 Campaigns 8 Computers 8 Leadership 7 Politics and government 7 Psychological aspects 7 Information technology 6 Prevention 6 Career development 5 Communism 5 Government policy 5 History, Military 5 Military policy 5 Research 5 Success in business 5 Time management 5 War 5 World politics 5 Asia, Southeastern 4 Foreign relations 4 Great Britain 4 Personnel management 4 Pictorial works 4 Telecommunication systems 4