The concept of a touchscreen dates to 1965; the first commercially successful touchscreen phone was the iPhone in 2007.
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The internet weighs approximately 50 grams — the weight of the electrons in motion.
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Gyroscopes maintain their orientation in space and are used in navigation systems for aircraft, ships, and spacecraft.
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The first programmable digital computer was Z3, built by German engineer Konrad Zuse in 1941.
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The transistor revolutionized modern electronics.
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The first computer virus, Creeper, spread across ARPANET in 1971 and displayed the message 'I'm the creeper — catch me if you can!'
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YouTube was originally a dating site before pivoting to general video sharing in 2005.
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3D printing (additive manufacturing) was invented in the 1980s — early machines cost hundreds of thousands of dollars.
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The Hoover Dam generates hydroelectric power for millions of people.
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