What is vending machine? How to use in English

The term "vending machine" refers to a device that automatically dispenses goods in exchange for payment without the need for human intervention. This technology has transformed the way we consume products by offering convenience and accessibility, particularly in places where it may be difficult to find a shop or vendor, such as train stations, airports, and office buildings. The concept of vending machines can be traced back to the early 19th century, when British government officials installed postal letterboxes, known as "pillar boxes," in public places. Vending machines for tobacco, postcards, and postage stamps soon followed, with Hong Kong installing the first vending machine for tobacco in the early 1900s. The first automatic vending machine for candy and tobacco was invented by the American entrepreneur, Richard Irvin, in 1888. The machine dispensed goods using a pneumatic system, which delivers objects via compressed air. This technology made it possible to sell a variety of goods, including drinks, snacks, and newspapers, without the need for an attendant. The modern vending machine has evolved significantly from Irvin's invention. Newer models use a combination of sensors, microprocessors, and computer technology to accurately calculate the amount charged and to dispense items efficiently and accurately. Some machines have been fitted with merchant terminals for credit and debit card payments, as well as contactless payment technologies such as NFC (Near Field Communication). The popularity and success of vending machines have led to the creation of new businesses, such as vending machine leasing and management companies, and vending machine parts suppliers. In addition, innovations such as healthy food options and higher-quality products have helped to modernize the industry and expand its reach beyond traditional snack and drink vending.