Windows 1.0 was released on November 20, 1985 and included several applications, including MS-DOS file management, Paint, Windows Writer, Notepad, Calculator, a calendar, card file, clock, and the game Reversi. Windows was a radical departure from DOS, upon which it was built, but although it was inspired by the Macintosh operating system, it was not it was not so much a groundbreaking innovation as a work in progress that would take years to gel. Basically Space Simulator was the last DOS game Microsoft ever published, and John, much to his credit, hand-tooled an interface that really mimicked Windows 95. Cherry later created the Solitaire game for Windows with improved card graphics provided by Macintosh interface artist, Susan Kare. There were three subsequent entertainment packs, which introduced, among others, very popular games like FreeCell, Pipe Dream, and WordZap. Microsoft wanted to get in on the action, and they partnered with Tandy, which owned Radio Shack and Memorex at the time.