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Google Books has been a saviour to students and ordinary citizens alike for years, but has not been met without great controversy over issues of copyright and intellectual property rights.
Many groups and individuals have attempted to bring legal action against Google for their use of widespread "snippets of copyrighted work" and "massive copyright infringement".
One of the major issues is, while Google in some cases provides no content available in books, it has scanned and made searchable millions of books for which many argue it has no right to do so.
Only recently, three top French publishers say they will sue Google for scanning and applying search technologies to their books and content "without permission".
When Google Buzz launched last year in 2010, it was the first micro-blogging social network-like service for which users had to opt-out of -- as users with a Gmail or Google account were automatically opted in without their prior permission.
It also added pre-existing contacts from a user's Gmail service into Buzz, which drew vast criticism from privacy critics and the media alike.
Not only this, a major privacy flaw allowed users to see who one was emailing and chatting too. While this was quickly changed and 'reset' by Google, it had already left a bitter taste for many of Google's users.
Censorship has been a huge topic for Google to try and deal with. It complies heavily with DMCA (Digital Millennium Copyright Act) requests on a regular basis and filters out searches. It also responds and complies to requests for the removal of other potentially damaging information.
Its presence in China alone has stirred many comments regarding the government's poor human rights record and lacking in freedom of speech legislation.
YouTube, also featured later in this slideshow, removes vast numbers of video each day. On the other hand, many of these include content copyrighted by others, and YouTube has had in place for some time the function to disallow even the publishing of videos which may contain music or content held in its copyright database.