Which product design innovation, first introduced commercially in 1984, revolutionized computer interfaces and was inspired by work at Xerox PARC?

In the world of technology inventions, some product designs fundamentally alter how we interact with machines. The early days of computing saw many innovations that might seem primitive today but were revolutionary at the time. This trivia question explores a pivotal product design development that transformed computers from specialized tools into accessible devices for the masses. Test your knowledge of this critical turning point in technological history!

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The Apple Macintosh's graphical user interface (GUI) with mouse navigation
IBM's command-line BASIC programming interface
Microsoft's MS-DOS text-based operating system
Commodore 64's joystick-controlled game interface