Indians of North America 55,229 Intellectual life 40,888 Influence 28,125 Industries 27,195 Islam 26,656 International relations 23,962 Instruction and study 19,160 In literature 19,105 International cooperation 18,677 Information technology 17,511 Interpersonal relations 14,712 Immigrants 14,201 International economic relations 14,095 Industrial management 14,038 Internet 12,638 Investigation 12,363 Indians of South America 11,646 Income tax 11,269 Investments 10,887 Informatique 10,594 International law 10,204 Information storage and retrieval systems 9,554 Information services 9,544 International business enterprises 9,467 Investments, Foreign 8,571 Illinois State University 8,398 Influence (Literary, artistic, etc.) 7,856 Interviews 7,643 Indians 7,544 Insects 7,256 Industrial relations 7,141 Italian language 7,078 Indexes 6,972 Industrial policy 6,809 Italian literature 6,634 Inheritance and succession 6,409 Infant 6,311 Identification 6,293 Indians of Mexico 6,217 Interior decoration 6,156 Image processing 6,032 Imprints 6,030 Identity 5,657 Infants 5,601 Irrigation 5,504 International trade 5,486 Indigenous peoples 5,404 Intelligence service 5,394 Instrumental music 5,338 Intellectuals 5,278 International 5,240 Imperialism 5,187 Intercultural communication 5,120 International finance 4,994 Industrial safety 4,892 IngeĢnierie 4,891 Identity (Psychology) 4,872 Internal Medicine 4,772 Islam and politics 4,702 Inventions 4,653 Integrated circuits 4,632 Imports 4,615 Insurance 4,537 Indian reservations 4,465 Information Systems 4,306 Interpersonal communication 4,227 Industrial applications 4,090 Income distribution 3,982 In-service training 3,929 Instrumental ensembles 3,915 Imagination 3,721 Interest 3,717 Industrie 3,564 Industrial hygiene 3,547 Income 3,544 International Relations 3,544 Infrastructure (Economics) 3,528 Indian wars 3,498 Iraq War, 2003-2011 3,492 Irish authors 3,477 Intellectual property 3,405 Islamic law 3,361 Immunology 3,299 Inflation (Finance) 3,283 Inscriptions 3,100 International claims 3,098 Illegal aliens 3,049 Inspection 3,046 Installations (Art) 3,035 Inventors 3,010 Industrial arts 2,960 Incidental music 2,904 Insurance, Flood 2,892 Insurgency 2,854 Industrial Management 2,842 Interpretation and construction 2,779 Indian land transfers 2,702 Incunabula 2,693 Italian poetry 2,685 Internet marketing 2,681