Ключевые слова: buy, cafe, cashier, cell, cellphone, checkout, commerce, communication, consumer, contact, contactless, customer, device, digital, electronic, financial, girl, grocery, hand, machine, mobile, mobilephone, money, nfc, one, pay, paying, payment, people, person, phone, retail, rfid, scan, shop, smart, smartphone, smartwatch, store, technology, terminal, transaction, transfer, wallet, watch, wireless,