Description The National Library of Medicine (NLM) can help find the answers to your health care questions. The largest medical library in the world, NLM has a collection of more than 8 million books, journals, microfilms, photographs, and other items. The library provides resources in health care, biomedicine, and the biomedical components of the humanities, technology, and science. NLM also has a collection of old and rare medical materials. Its MedlinePlus web site provides consumer health information to the public. The NLM also supports a national network of local and regional medical libraries. The library is located in Maryland on the campus of the National Institutes of Health.