Literature 161 History 146 Politics and government 97 Literature Malayalam 93 Novel 76 Biography 59 Rural development 58 Religion 54 Literature Hindi 52 Foreign relations 47 Education 45 Communication 40 Data mining 40 Hindi literature 40 Agriculture 39 Finance 39 Industries 39 Malayalam fiction 39 Social conditions 38 Non-governmental organizations 37 Population 37 Tribes 37 Language and literature 36 Scheduled tribes 36 Transportation 36 Untouchables 36 Wildlife management 36 Stories Malayalam 35 Tourist trade 35 Urbanization 35