PubMed Central


May 19, 2022

PubMed Central is a free digital bibliographic database of scientific literature with a focus on biomedicine and life sciences. It is derived from the online Entrez PubMed biomedical literature search system. PubMed Central was developed by the US National Library of Medicine (NLM) as an online archive of biomedical scientific publications. The full text of all PubMed Central articles is freely available. Some participating publishers, however, delay the release of their articles for a period of time after the publication (often six months). In mid-2011, the archive contained about 2.2 million entries, including articles, editorials and letters. It grows at least 7% per year. In September 2004, PubMed Central, PubMed, and related NLM services handled about 1,300 requests per second, and delivered 1.3 terabytes of data per day.


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MEDLINE, an international database for the literature on life sciences and biomedical information PMID (PubMed identifier)

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