Project Gutenberg

Project Gutenberg is on line at http://www.gutenberg.org/. To say what one hopes is obvious, it is named after Johannes Gutenberg who brought us the Printing Revolution.

Project Gutenberg ex Wiki
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Project Gutenberg
(PG) is a volunteer effort to digitize and archive cultural works, to "encourage the creation and distribution of eBooks".[2] It was founded in 1971 by Michael S. Hart and is the oldest digital library.[3] Most of the items in its collection are the full texts of public domain books. The project tries to make these as free as possible, in long-lasting, open formats that can be used on almost any computer. As of March 2013, Project Gutenberg claimed over 42,000 items in its collection.

Wherever possible, the releases are available in plain text, but other formats are included, such as HTML, PDF, EPUB, MOBI, and Plucker. Most releases are in the English language, but many non-English works are also available. There are multiple affiliated projects that are providing additional content, including regional and language-specific works. Project Gutenberg is also closely affiliated with Distributed Proofreaders, an Internet-based community for proofreading scanned texts.
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No printing means no books. Johannes made  a difference, a big one.