Fort Knox In Box: How ATMs Work

A heavy steel vault protects 2 cassettes that each hold over 1,000 bills. A sophisticated assemblage of sensors, rollers and conveyors ensures the correct number of bills is distributed to the account holder.

MACHINES: HOW THEY WORK
Thursdays 10/9c on Science
http://www.sciencechannel.com/tv-shows/machines-how-they-work/

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