The Calculator Wars. How a Business Failure Led to the…

Fifty years ago, Ed Roberts was facing bankruptcy. His response kicked off a personal computer revolution. Today, a calculator is an app, and not one you’d actually pay for.

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The History Of The Calculator: When was the Calculator First Invented?

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The History Of The Calculator: When was the Calculator First Invented?

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Mechanical calculator - Wikipedia

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The History Of The Calculator: When was the Calculator First Invented?

Mechanical calculator - Wikipedia

Computer - History, Technology, Innovation