[pa_dweller]

Same thing for a modern Jet airplane, nuclear reactor, and endless other things we take for granted now that would be pure magic back then and that was only 250 years ago....think of technology that might be 1 million years more advanced that we currently know....

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I read a SF short story about a guy who had time-traveled back to Isaac Newton's time.  He somehow had contrived to take along with him an electronic handheld calcualtor, an early LED type.

He wangled a meeting with Newton and showed him the calculator, thinking it would speed technological advance through the years.  Newton saw the red LED characters and decided the thing was of the devil and our hero had to run for his life.

[Oatka]

Newton saw the red LED characters and decided the thing was of the devil and our hero had to run for his life.

Back when movable type first came out, people in a French City nearly burned a printer at the stake. It seems that every "E" (for instance) looked EXACTLY like any other "E" and there could only be one answer: The guy was in league with the Devil.