Ключевые слова: banking, bar code, bill, business, buying, cash, cashier, city life, code, commerce, communication, connection, convenience, credit, customer, cyberspace, digital, digital wallet, electronic, finance, future technology, generation, grocery, internet, mobile app, mobile payment, mobile phone, money, no wire, pay, paying, payment, phone, purchase, qr, retail, scan, service, shop, small business, smart, store, supermarket, system, technology, terminal, transaction, transfer, wallet, wireless,