format c: The MS DOS Manual taught me the true power of the PC. Typing those 9 characters and hitting Enter made a very large change in my computer. Before I ran that command, my computer booted. I turned on the power switch and I got a prompt to perform an action. After, it didn’t do anything. Something like this had never happened with my last “home computer,” the Atari 800 XL. No matter what I did with that device,
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