The U.S. National Library of Medicine (NLM) is the world's largest biomedical library, located in Bethesda, Maryland. It provides access to a vast collection of medical literature, research, and information resources. The NLM plays a crucial role in advancing health and medicine by making knowledge available to researchers, healthcare professionals, and the public. In addition to its extensive library, the NLM offers various online databases and tools, such as PubMed, which allows users to search for scientific articles. The library also supports health information initiatives and promotes the use of technology in healthcare, making it an essential resource for anyone interested in medicine and public health.