European history 21 Research & information: general 21 History of the Americas 12 Migration, immigration & emigration 12 Social & cultural history 11 Humanities 10 Social interaction 10 Education 9 Society & culture: general 9 Early modern history: c 1450/1500 to c 1700 8 History 8 History of engineering & technology 8 Sociology 8 Gender studies, gender groups 7 Sociology & anthropology 7 Literature: history & criticism 6 Modern history to 20th century: c 1700 to c 1900 6 Society & social sciences 6 Disability: social aspects 5 Economics, finance, business & management 5 History of medicine 5 Media studies 5 Politics & government 5 Spain 5 Technology: general issues 5 Agriculture & farming 4 Child & developmental psychology 4 Cultural studies 4 Educational strategies & policy 4 Social & cultural anthropology, ethnography 4