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Money rules the worlds as the saying goes. Everyone of us needs money for the daily life. In the distant past, shells and salt were exchanged for wares, later people paid with coins. The Chinese are known to be the inventors of bank notes. Nowadays one can pay with a plastic card, or through the internet, simply by typing in numbers one can purchase goods. What are currencies? How are coins produced? How do banks function? How does a bank automat function? WAS IST WAS also visits the central bank and explains which safety features bank notes possess.