Vending machine is a self-service device that dispenses a product or provides a service when money or a token, card, or key is inserted into it. Vending machines dispense such items as candy, cigarettes, coffee, newspapers, postage stamps, and soft drinks. Some vending machines dispense frozen foods, soups, salads, sandwiches, fruits and desserts, and complete meals. Service machines include coin-operated washing machines, pay telephones, and subway fare-card machines. In some airports, vending machines rent cellular telephones and carrying carts. Vending machines sell billions of dollars worth of goods and services each year.