How is PubMed Central related to UKPMC, PMC International, or portable PMC?
PMC International (PMCI) is a collaborative effort between NLM, the publishers whose journal content makes up the PMC archive, and organizations in other countries that share NLM’s interest in archiving life sciences literature. The long term goal of PMCI is to create a network of digital archives that can share some or all of their respective locally deposited content with others in the network. To date, NLM has authorized one PMCI center, UKPMC, which is sponsored by the Wellcome Trust and several other major UK research funders. UKPMC became operational in January 2007 and currently receives all its journal content directly from the U.S. PMC archive. Portable PMC (pPMC) is a version of the PMC software that has been developed by NCBI to enable PMCI sites such as UKPMC to display their content in a presentation style similar to the U. S. PMC site. Read more about PMCI and pPMC.