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 ↓↓↓
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.html
NUMBERPHILE
Website: http://www.numberphile.com/
Numberphile on Facebook: http://www.facebook.com/numberphile
Numberphile tweets: https://twitter.com/numberphile
Subscribe: http://bit.ly/Numberphile_Sub
Videos by Brady Haran
Patreon: http://www.patreon.com/numberphile
Brady’s videos subreddit: http://www.reddit.com/r/BradyHaran/
Brady’s latest videos across all channels: http://www.bradyharanblog.com/
Sign up for (occasional) emails: http://eepurl.com/YdjL9
Numberphile T-Shirts: https://teespring.com/stores/numberphile
Other merchandise: https://store.dftba.com/collections/numberphile