The National Library of Medicine (NLM) is a vital resource for health information in the United States. Established in 1836, it is the world's largest biomedical library, providing access to a vast collection of medical literature, research, and data. The NLM supports healthcare professionals, researchers, and the public by offering valuable resources like PubMed, a free database of scientific articles. In addition to its extensive collections, the NLM plays a crucial role in advancing medical research and education. It develops innovative tools and technologies to help users find and understand health information. By promoting access to knowledge, the NLM contributes to improving public health and medical care.