Ключевые слова: air, background, bank, banking, banknote, bill, business, buy, card, cash, cashless, checkout, collage, commercial, contactless, customer, device, digital, dollar, electronic, fall, falling, finance, financial, fly, flying, grey, levitation, machine, modern, money, motion, nfc, object, pay, paying, payment, pos, purchase, reader, retail, sale, service, shop, store, system, technology, terminal, transaction, transfer,