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The world’s first vending machine was invented by Hero of Alexandria in the first-century Roman Egypt. The machine dispensed Holy Water in the temples. A coin was deposited and it fell on a pan attached to a lever. The lever opened a valve which let some water flow. The pan continued to tilt the weight of the coin until it fell off, at which point a counterweight snapped the lever up and turned off the valve. The first modern coin-operated vending machines were introduced in
