Perhaps the oldest continuously used calculating tool aside from fingers, the abacus is a masterpiece of power and simplicity. Abacuses were widely used in Asia and Europe for centuries, and remain common today.
Read more about the ""Computer History: The First 2,000 Years" exhibit.
Photo courtesy of The Computer History Museum
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Feb 26, 2014 8:39 PM
Is your iPod touch-toting child spending too much time on the Internet? Christopher Breen shows you how to carefully control the hours they're able to access your Wi-Fi network.
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