Islam Religious aspects 26 History 17 Encyclopedias 13 Customs and practices 10 Hadith 10 Doctrines 7 Islamic countries 5 Religious life 5 Terrorism 5 Texts 5 Civilization 4 Dictionaries 4 Encyclopedia 4 Prophets in the Koran 4 Civilization, Islamic 3 Islam and politics 3 Islamic law 3 Politics and government 3 Sources 3 Banks and banking 2 Congresses 2 Death 2 Economic conditions 2 Economics 2 Education 2 Foreign relations 2 Islamic Empire 2 Marriage 2 Prayer books and devotions 2