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Amazing Old Calculator (Curta) - Numberphile

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Published on Oct 7, 2012

Alex's book: http://amzn.to/1l0yX46
The Curta is a pocket-sized, mechanical, digital calculator!!! It was invented by Curt Herzstark.
More links & stuff in full description below ↓↓↓

Shown here by Alex Bellos, author of Alex's Adventures in Numberland.

More about our contributors, including Alex, at http://www.numberphile.com/team/index...

NUMBERPHILE
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