> 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.
There was definitely one in Windows 3.1 as well, though I don't believe it made it to 95. I've often heard that Solitaire and Minesweeper were also intended to effectively be mouse tutorials where people learned by doing while playing the game.