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• IBM Corporation
• Independence Foundation
• Independent Television Service
• Indiana University (Minority Faculty Fellowship Program)
• Infectious Diseases Society of America
• Initial Teaching Alphabet Foundation
• Institut Francais de Washingon
• Institute for Advanced Studies in the Humanities
• Institute for Advanced Study- School of Mathematics
• Institute for Humane Studies
• Institute for International Studies
• Institute for Public Relations Research and Education
• Institute for Research on Pathological Gambling and Related Disorders
• Institute of American Cultures
• Institute of Classical Studies
• Institute of Current World Affairs
• Institute of Early American History & Culture
• Institute of Food Technologies
• Institute of Industrial Engineers
• Institute of International Education
• Institute of Noetic Sciences
• Institute of Southeast Asian Studies
• Institute of Turkish Studies
• Intel Corporation
• Intellectual Property Owners
• Inter American Press Association Scholarship Fund
• Inter-University Board for Chinese Language Studies
• International Association for the Great Lakes Research
• International Center for Research on Women
• International Council for Scientific Unions
• International Federation of Library Associations and Institutions
• International Foundation for Ethical Research (IFER)
• International Foundation for Science
• International Foundation of Employee Benefit Plans
• International Institute of Cellular and Molecular Pathology
• International Lead Zinc Research Organization
• International Life Sciences Institute
• International Paper Company Foundation
• International Research & Exchanges Board - IREX
• International Rett Syndrome Association
• International Society of Arboriculture
• International Union Against Cancer
• International Union for Vacuum Science
• International Youth Foundation
• Invent Now (National Inventors Hall of Fame) - National Collegiate Competition (formerly under BFGoodrich)
• Irish American Cultural Institute
• Ittleson Foundation

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