Ключевые слова: advertising, after, bar, barcode, black, businessman, capture, card, cash, cashless, cellphone, checkout, code, commerce, concept, data, digital, ecommerce, electronic, hand, holding, information, internet, isolated, mobile, mockup, online, pay, payment, phone, product, qr, qr code scanning, qrcode, quick, reader, receipt, restaurant, retail, scan, scanner, screen, showing, smart, smartphone, stand, store, technology, using, white,