Lisa



"Apple invents the personal computer. Again."

Back in the early 80s, Apple knew that graphical interfaces were the future, so they had a big project for that. The Lisa was very advanced for a personal computer at the time, with modern features like protected memory and preemptive multitasking. However, that brought its downfall: it cost a whooping $9,995 (almost $24,000 adjusted for inflation), and it was a sluggish machine because the operating system was too sophisticated for the hardware.

Since the Lisa was a flop, Apple went for their "plan B" the following year: the Macintosh, a simpler machine that they could sell for less than a third of that price.