Ключевые слова: abstract, app, application, art, background, biology, cellphone, chemical, chemistry, communication, design, device, digital, display, experiment, flat, gadget, glass, graphic, icon, illustration, internet, internet of things, iot, lab, laboratory, long, long shadow, mobile, phone, scientific, screen, shadow, shape, sign, smart, smartphone, symbol, technology, telephone, test, touch, touchscreen, tube,