The New York State Psychiatric Institute Research Library houses a unique collection specializing in the literature of psychiatry and mental health. As one of the largest psychiatric libraries in the nation, it holds approximately 35,000 volumes and subscribes to over 450 periodicals. The collection emphasizes the multidisciplinary aspect of the Institute. Most source material is in psychiatry, but many books and journals can also be found in psychoanalysis, psychology and neuroscience. Reference services feature computerized bibliographic retrieval. The major databases in the mental health field, including MEDLINE and PSYCINFO, are delivered with menu-driven, user-friendly interfaces, and are available to all clientele. Borrowing privileges are extended to employees of PI and the New York Presbyterian Hospital; students and others not employed at PI or the NYPH may read in the library but cannot borrow items.