The third invention we’re featuring in honor of the 4th of July was developed by 20th-century Americans. More than 2 billion people around the world use this invention regularly in nearly all aspects of life. What enables so many to learn, communicate, shop, bank, and protest—all through one mechanism? Check out the USA.gov Blog throughout the week to read about four great American inventions. You can also follow us on Facebook and Twitter (#madeintheusa, #july4).
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Celebrating American Inventions: The World at Your Fingertips
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