PubMed Central (PMC) is a free full-text digital archive of biomedical and life sciences journal literature.It was developed by the National Center for Biotechnology Information (NCBI), a division of the National Library of Medicine (NLM) at the U.S. National Institutes of Health (NIH).PMC began operating in 2002 and currently contains more than 1.5 million journal articles, most of which have a corresponding entry in PubMed.The archive has material dating back to the mid-1800s for some journals.The NIH’s recently revised Public Access Policy requires authors of NIH-funded articles to submit their work to PubMed Central.To be notified via email when PMC adds a new journal to its list or adds a large number of back issues for an existing journal, add your name to the PMC News list. Access PMC by selecting PubMed Central from the bottom of the left toolbar on the PubMed homepage.