Ключевые слова: access, application, barcode, bill, building, business, buy, capture, cash, cashier, code, commercial, communication, concept, connection, credit, customer, digital, display, electronic, hand, information, internet, mobile, mobile phone, money, office, online, online shopping, pay, payment, phone, price, product, purchase, qr, qr code, reader, receipt, retail, scan, scanner, scanning, screen, shop, smart, smartphone, store, technology, touch screen,