The rapid growth of the field of psychogeriatrics, spurred on by aging populations, substantially increased funding, and growing interest by professionals, government, and society, has led, in turn, to a rapid growth of medical information. The management of this information poses a significant challenge to health care professionals and scientists. This rapid growth of knowledge has spawned a whole new field, “Medical Informatics.” This field concerns itself with the “cognitive, information processing, and communication tasks of medical practice, education and research, including the information science and the technology to support these tasks” (Greenes & Shortliffe, 1990).