Ключевые слова: bill, business, buy, cashier, checkout, commerce, communication, consumer, credit, customer, debit, device, digital, electronic, female, finance, hand, human, machine, mobile, money, nfc, one, pay, paying, payment, people, purchase, retail, sale, scan, scanning, secure, service, shop, shopping, smartphone, smartwatch, store, sync, technology, telephone, transaction, transfer, wallet, watch, wear, wireless, woman, wristwatch,