National Library of Medicine
The National Library of Medicine is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items -books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula. Free access to Medline for online searches of medical literature, and MedlinePlus to link the general public to many consumer health information sources.