Photograph of early computer with keyboard and monitor.

The Xerox Parc Alto was the first real desktop to make computing “personal”—its features included a graphical user interface, an ethernet connection, the first mouse, one of the first video games, a windows screen arrangement, a bitmap editor, and an early paint program. While Xerox famously failed to commercialize it, Steve Jobs saw its remarkable features and incorporated them into the Mac. This image is in the public domain.

This image is in the public domain.