Ключевые слова: advertising, after, bar, barcode, businessman, buy, camera, capture, card, cashless, cell, cellphone, code, concept, contactless, data, digital, discount, ecommerce, hand, holding, id, laptop, man, menu, mobile, online, order, pay, pay qr code, payment, people, phone, qr, qrcode, reader, restaurant, retail, sales, scan, scanner, shop, showing, smart, smartphone, store, suit, tablet, technology, using,