Research & information: general 170 Political structure & processes 150 Technology: general issues 141 Economic systems & structures 113 History of engineering & technology 107 Political structures: democracy 79 Political science & theory 78 Politics & government 47 Biology, life sciences 46 Medicine 40 Political economy 39 Public administration 33 Social issues & processes 33 Sociology 31 Science: general issues 28 Development economics & emerging economies 26 Algorithms & data structures 24 Economic theory & philosophy 23 Economic growth 19 linguistics 17 Architectural structure & design 16 Comparative politics 16 Computer programming / software development 16 Mathematics & science 16 Civil engineering, surveying & building 15 Economics 15 Education 15 Mathematical theory of computation 14 Media studies 14 Development studies 13