History 16 Research 9 Philosophy 7 Acting 6 Arts 6 Economic development-- Economic Planning 6 Report writing 6 Social aspects 6 Ecology 5 Economic development 5 History and criticism 5 Literature 5 Mass media 5 PATALARAMAYANAM KILIPPATTU 5 Social classes 5 Technological innovations 5 Theater 5 Tourism 5 Biotechnology 4 Cloud computing 4 Communication 4 Communication-Encyclopedias 4 Finance 4 International relations 4 Marine ecology 4 Mathematics 4 Project management 4 Psychological aspects 4 Psychology 4 Religion 4