PubMed is a free resource developed and maintained by the National Center for Biotechnology Information (NCBI) at the U.S. National Library of Medicine (NLM), part of the National Institutes of Health (NIH). It provides access to over 35 million citations and abstracts from biomedical and life sciences literature, primarily from the MEDLINE database, as well as from PubMed Central (PMC) and books.

* Scope: Medicine, nursing, dentistry, veterinary medicine, healthcare systems, and preclinical sciences. * Content types: Journal articles, case reports, reviews, clinical trials, systematic reviews, and more. * Indexing quality: Citations indexed in MEDLINE are curated using the Medical Subject Headings (MeSH) vocabulary. * Access: PubMed is freely available to the public, but full-text access depends on journal or institutional subscriptions, unless the article is open access.

Website: [https://pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov)