The Alzheimer’s Disease Cooperative Study (ADCS) was formed in 1991 as a cooperative agreement between the National Institute on Aging (NIA) and the University of California San Diego. The ADCS is a major initiative for Alzheimer’s disease clinical studies in the federal government, addressing treatments for both cognitive and behavioral symptoms. This is part of the NIA Division of Neuroscience program’s effort to facilitate the discovery, development, and testing of new drugs for the treatment of Alzheimer’s, and is also part of the Alzheimer’s Disease Prevention Initiative. Dr. David C. Weisman of Abington Neurological Associates was recognized as an investigator in this important effort.