Ключевые слова: bill, business, buy, cafe, cashier, cashless, cell, checkout, code, coffee, connection, credit, customer, dataphone, device, digital, females, food, hand, indoors, machine, mobile, money, online, orders, pay, paying, payment, people, person, phone, purchase, qr, reader, restaurant, retail, scan, scanning, service, shop, smart, smartphone, store, technology, transaction, transfer, travelers, vocation, wireless, woman,