Microsoft included Solitaire in Windows as a mouse tutorial
Microsoft has included the game Solitaire as part of its Windows product line since Windows 3.0, starting from 1990. They intended games like Solitaire and Minesweeper "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.
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 open on the man's office computer.