A world of knowledge for the nation's health: the U.S. National Library of Medicine.

The origins, history, current collections and services, and projected future services of the U.S. National Library of Medicine are described, and the seminal figure in its development is profiled. The library, now located on the campus of the National Institutes of Health, was founded in 1836 as the Library of the Army Surgeon General's Office. The current facility holds more than 3.5 million items and offers innovative information services to health-care professionals worldwide. The leading figure in the library's development was Army physician John Shaw Billings, whose accomplishments included the international expansion and bibliographic organization of the holdings and creation of the Index Medicus and Index-Catalogue. The computerized services offered by the library include the MEDLINE database, which is based on Index Medicus, and pharmacy-related databases. Health-care practitioners can gain access to the library's resources through the Regional Medical Library Network. Among projects under development at the Lister Hill National Center for Biomedical Communications are microcomputer and optical disk technologies, the preservation of paper collections, and a unified medical language system. The U.S. National Library of Medicine has served the health-care community for 150 years; many services in the area of biomedical communications are available to pharmacists and other practitioners through the library and the Regional Medical Library Network.