After two and a half years of planning, the Digital Public Library of America (DPLA), the U.S.'s first public online-only library, opened its doors today -- or at least was made publicly available on the Internet.

The DPLA is a free, open-source resource that makes a number of digital collections and archives across the country available in one place. It launched as a series of partnerships with the Smithsonian, the National Archives, New York Public Library, the University of Virginia, Harvard, Digital Library of Georgia, Minnesota Digital Library, Mountain West Digital Library and others. All of the text, photos, videos and audio contained in the DPLA can be searched, or browsed by place or time on the DPLA website.

Executive director Dan Cohen told The Huffington Post that the digital library currently contains more than two million items "with tens of millions to come in the years ahead."
Cohen outlined in a blog post introducing DPLA the goals for the digital library: to be an easy-to-use portal of digital collections, to be a sophisticated technical platform that can be built on top of, and to be an innovative institution that will advocate for reading and research in the 21st century.

The Berkman Center for Internet and Society at Harvard initiated the project, according to NPR, but it rapidly became a much larger collaboration between numerous libraries and digital archives.
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