Ключевые слова: advertising, background, bar, barcode, buy, card, cash, code, commerce, concept, contactless, customer, dark, digital, display, ecommerce, hand, id, identification, man, menu, mobile, online, order, pay, payment, people, person, phone, price, product, qr, qr code mobile, qrcode, reader, receipt, retail, scan, scanner, screen, shop, showing, smart, smartphone, stand, store, technology, telephone, transaction, wallet,