Visual tour: From the abacus to the iPod

A new exhibit at the Computer History Museum showcases more than 20 major areas of computer history. Here are some highlights.
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Image courtesy The Computer History Museum, copyright Mark Richards

The abacus

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.

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