<P> Microsoft intended Solitaire "to soothe people intimidated by the operating system," and at a time where many users were still unfamiliar with graphical user interfaces, it proved useful in familiarizing them with the use of a mouse, such as the drag - and - drop technique required for moving cards . </P> <P> Lost business productivity by employees playing Solitaire has become a common concern since it became standard on Microsoft Windows . In 2006, a New York City worker was fired after Mayor Michael Bloomberg saw the Solitaire game on the man's office computer . </P> <P> In October 2012, along with the release of the Windows 8 operating system, Microsoft released a new version of Solitaire called Microsoft Solitaire Collection . This version, designed by Microsoft Studios and developed by Arkadium, is advertisement supported, and introduced many new features to the game . </P> <P> Microsoft Solitaire celebrated its 25th anniversary on May 18, 2015 . To celebrate this event, Microsoft hosted a Solitaire tournament on the Microsoft campus and broadcast the main event on Twitch . </P>

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