Ключевые слова: abstract, author, background, business, businessman, college, communicate, communication, concept, diary, digital, double, e, electronic, email, envelop, european, exposure, fingers, future, holding, icon, intelligence, internet, job, knowledge, light, mail, message, monitor, notepad, online, pen, research, school, send, single, social, spam, symbol, technology, think, trader, university, web, white, woman, working, writes,