PLOS (for Public Library of Science) is a nonprofit open-access science, technology and medicine publisher, innovator and advocacy organization with a library of open-access journals and other scientific literature under an open-content license. It launched its first journal, PLOS Biology, in October 2003 and publishes seven journals, as of October 2015. The organization is based in San Francisco, California, and has a European editorial office in Cambridge, England. The publications are primarily funded by payments from the authors.