Vending machine

A vending machine is a machine that dispenses merchandise when a customer deposits money, validated by a currency detector, sufficient to purchase the desired item (as opposed to a shop, where the presence of personnel is required for every purchase). It is believed to have been first invented by Hero of Alexandria, a 1st century inventor. His machine accepted a coin and then dispensed a fixed amount of "holy water".

Related Topics:
Machine - Currency detector - Shop - Hero of Alexandria - Holy water

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