Ключевые слова: abstract, app, background, book, bookstore, business, character, class, communication, course, distance, ebook, education, elearning, exam, graphic, icon, idea, illustration, knowledge, learning, line, marketing, network, object, online, outline, people, reading, school, science, sign, social media, startup, study, success, support, symbol, teaching, team, technology, test, training, tutorial, university, web, webinar, writing,