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Cliff explains his passion for two Friden EC-132s. More links & stuff in full description below ↓↓↓ More Cliff videos: http://bit.ly/Cliff_Videos Calculator Unboxings: http://bit.ly/CalcUnbox Millionaire Machine: https://youtu.be/wwh0KH-ICCw Additional thanks to http://www.oldcalculatormuseum.com Read more about the machine at: http://www.oldcalculatormuseum.com/friden130.html Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. 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