Ключевые слова: abstract, background, booking, business, businesspeople, cell, communication, computer, concept, consumption, devise, digital, doodle, double, drawing, electronic, email, envelop, exposure, fill in, goal, icon, industry, intelligent, internet, mail, man, message, multi, network, online, phone, purchase, relation, safety, send, sketch, smart, social, spam, store, strategy, symbol, tablet, touchscreen, web, wireless, worker, writing,