Ключевые слова: bill, business, cafe, cafeteria, cashier, cashless, cellphone, coffee, customer, device, digital, electronic, hand, iwallet, man, mobile, money, pay, paying, payment, people, phone, qr code, queues, reader, restaurant, scan, scanner, scanning, service, shop, small, smart, smartphone, store, technology, tele cash, terminal, transaction, transfer, waiter, wallet, wireless, woman,