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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.

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...

Website: http://www.numberphile.com/
Numberphile on Facebook: http://www.facebook.com/numberphile
Numberphile tweets: https://twitter.com/numberphile
Videos by Brady Haran

A run-down of Brady's channels:
http://periodicvideos.blogspot.co.uk/...

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