The U.S. National Library of Medicine (NLM) is the world’s largest biomedical library and a part of the National Institutes of Health (NIH), located in Bethesda, Maryland. Founded in 1836, it serves as a global leader in biomedical informatics, data science, and medical information dissemination.

Its mission is to collect, organize, and provide access to biomedical literature and health information to scientists, healthcare professionals, and the public.

Key services and resources developed or maintained by NLM include:

PubMed – database of biomedical citations and abstracts.

PubMed Central (PMC) – free archive of full-text biomedical articles.

MEDLINE – curated bibliographic database using MeSH (Medical Subject Headings).

ClinicalTrials.gov – registry of clinical trials.

TOXNET, GenBank, MeSH, and the NCBI suite of databases.

Website: https://www.nlm.nih.gov