Google Books
As of October 2015, the number of scanned book titles was over 25 million, but the scanning process has slowed down in American academic libraries.[10][11] Google estimated in 2010 that there were about 130 million distinct titles in the world,[12][13] and stated that it intended to scan all of them.[12]
.. In response to search queries, Google Books allows users to view full pages from books in which the search terms appear if the book is out of copyright or if the copyright owner has given permission. If Google believes the book is still under copyright, a user sees “snippets” of text around the queried search terms. All instances of the search terms in the book text appear with a yellow highlight.
The four access levels used on Google Books are:[14]
.. The project began in 2002 under the codename Project Ocean. Google co-founder Larry Page had always had an interest in digitizing books. When he and Marissa Mayerbegan experimenting with book scanning in 2002, it took 40 minutes for them to digitize a 300-page book. But soon after the technology had been developed to the extent that scanning operators could scan up to 6000 pages an hour.[19]
.. The page also displays bibliographic information, which can be exported as citations in BibTeX, EndNote and RefMan formats. Registered users logged in with their Google accounts can post reviews for books on this page. Google Books also displays reviews from Goodreads alongside these reviews.[26] For books still in print, the site provides links to the website of the publisher and booksellers.
.. While Google Books has digitized large numbers of journal back issues, its scans do not include the metadata required for identifying specific articles in specific issues. This has led the makers of Google Scholar to start their own program to digitize and host older journal articles (in agreement with their publishers).[43]
.. The Google Books Library Project is aimed at scanning and making searchable the collections of several major research libraries.[44] Along with bibliographic information, snippets of text from a book are often viewable. If a book is out of copyright and in the public domain, the book is fully available to read or download.[14]