A vending machine is commonly known as automatic retailing. Vending machine mechanism dispenses items such as snacks, beverages, toiletries, cigarettes, tickets, and other consumer products to customers automatically, in exchange for a payment in form of a coin, bill, or card inserted into the machine. The first vending machine or automatic retailer was a machine that accepted a coin and then dispensed holy water, documented in Hero's book entitled "Mechanics and Optics". A coin was inserted via Read more [...]