PubMed Central (PMC) is a free digital archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health (NIH), developed and managed by NIH's National Center for Biotechnology Information (NCBI) in the National Library of Medicine (NLM).
It is not a journal publisher.
PMC aims to fill the role of a world class library in the digital age.
NLM believes that giving all users free access to the material in PMC is the best way to ensure the durability and utility of the archive as technology changes over time.
PMC is the database of choice, for researchers and clinicians alike, to locate relevant articles and, in many cases, link directly to a publisher's site for the full text.
A journal is guaranteed access to a copy of its deposited data upon request, at no cost. PMC does not claim copyright on any material deposited in the archive. Copyright remains with the journal publisher or with individual authors, whichever is applicable.
PMC overview. Internet. Accessed on May 16, 2010.