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• Packard (David and Lucille) Foundation
• Pan American Health Organization
• Panasonic Foundation
• Paralyzed Veterans of America - Spinal Cord Injury Education and Training Foundation
• Paralyzed Veterans of America - Spinal Cord Injury Research Foundation
• Parapsychology Foundation
• Pardee (Elsa U.) Foundation
• Parkinson's Disease Foundation
• Peace Development Fund
• Pediatric AIDS Foundation
• Pediatric Brain Tumor Foundation of the United States
• Pembroke Center for Teaching and Reseach on Women
• Penn (William) Foundation
• Penney (J. C.) Company
• Pennsylvania (Commonwealth of)
• Pennsylvania Council on the Arts
• Pennsylvania Humanities Council
• Pepsico Foundation
• Peterson (Roger Tory) Institute of Natural History
• Pew Charitable Trusts
• Pew Scholars Program in the Biomedical Sciences
• Pfeiffer (Gustavus and Louise) Research Foundation
• Pfizer Pharmaceuticals
• Pharmaceutical Research & Manufacturers of America Foundation
• Phi Beta Kappa Society
• Phillips (Ellis L.) Foundation
• Pittsburgh (City of)
• Pittsburgh Child Guidance Foundation
• Pittsburgh Digital Greenhouse
• Pittsburgh Filmmakers
• Pittsburgh Foundation
• Plastic Surgery Educational Foundation
• Playboy Foundation
• PNC Bank
• Poetry Society of America
• Point of View
• Pollock-Krasner Foundation, Inc.
• Population Council
• PPG Industries Foundation
• Presser Foundation
• Prevent Blindness America
• Price Waterhouse Foundation
• Princess Grace Awards
• Proctor & Gamble Company
• Prostate Cancer Foundation
• Prudential Foundation (Use search box -- search for "Foundation")
• Public Welfare Foundation
• Purina Mills
• Pymatuning Laboratory of Ecology

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