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• SAE Foundation - Society of Automotive Engineers
• SBC Foundation
• SEG Foundation
• SIDS Alliance
• Sage (Russell) Foundation
• Sandler Family Supporting Foundation
• Santarus, Inc.
• Sasakawa Peace Foundation
• Scaife (Sarah) Foundation
• Scaife Family Foundation
• Schering-Plough Foundation
• Schomburg Center for Research in Black Culture
• School of American Research
• Scleroderma Foundation
• Scoville (Herbert) Peace Fellowship
• Searle Scholars Program
• Sears
• Semiconductor Research Corporation
• Sense of Smell Institute
• Shell Oil Company Foundation
• Shubert Foundation
• Sigma Delta Epsilon
• Sigma Theta Tau International
• Sigma Xi, The Scientific Research Society
• Sinfonia Foundation
• Skillman Foundation
• Skin Cancer Foundation
• Sladen (Percy) Memorial Fund
• Sloan (Alfred P.) Foundation
• SME Education Foundation (Society of Manufacturing Engineers)
• Smithers (Christopher D.) Foundation
• Social Science Research Council
• Society for Analytical Chemists of Pittsburgh
• Society for Maternal-Fetal Medicine
• Society for Research in Child Development
• Society for Technical Communication
• Society for the Humanities
• Society for the Scientific Study of Sexuality
• Society of Biological Psychiatry
• Society of Cosmetic Chemists
• Society of Critical Medicine
• Society of Fellows in the Humanities (Columbia University)
• Society of Naval Architects & Marine Engineers
• Society of Nuclear Medicine, Education, & Research Foundation
• Society of Toxicology
• Society of Women Engineers
• Sons for the Republic of Texas
• Sontag Foundation (The)
• Sony Corporation of America
• Soros Foundations Network
• Southern Jewish Historical Society
• Space Telescope Science Institute
• Special Libraries Association
• Spectroscopy Society of Pittsburgh
• Spencer Foundation
• SPIE - International Society for Optical Engineering
• Spinal Cord Society
• Sprint Foundation
• SPSSI (Society for the Psychological Study of Social Issues)
• Stanford Humanities Center
• Starr Foundation
• State Farm Companies Foundation
• Staunton Farm Foundation
• Stern Family Fund
• Strauss (Lauri) Leukemia Foundation
• Sugar Association
• Surdna Foundation
• Swedish Information Service

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