Ключевые слова: app, application, background, bar, barcode, bill, capture, cashless, cell, cellphone, code, concept, contactless, customer, device, digital, display, hand, hold, id, information, isolated, link, male, man, mobile, online, order, pay, payment, people, person, phone, qr, qrcode, quick, reader, retail, scan, scanner, screen, sign, smart, smartphone, technology, touch, use, using, verification, white,