The Boeing 747's upper deck was originally intended as a lounge — it was converted to seats when airlines wanted more capacity.
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The printing press was invented around 1440 by Gutenberg — within 50 years, over 20 million books had been printed.
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The mechanical clock improved timekeeping accuracy.
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Most humans alive today have access to technologies unknown 100 years ago.
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Moore's Law observed that transistor density on chips doubles approximately every two years — this held for roughly 50 years.
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Morse code was originally developed for electric telegraphs, not radio.
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Email was invented before the World Wide Web.
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The radio enabled wireless communication over long distances.
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