Ключевые слова: abstract, application, background, barcode, button, cell, code, concept, digital, ecology, frame, icon, identifier, information, isolated, item, label, layout, line, man, mobile, outline, pandemic, payment, phone, pictogram, poster, product, protest, purchase, purchases, qr, qr code, requirements, scan, scanner, sign, smartphone, square, step, strike, symbol, system, technology, template, vaccination, virus, web, young,