Ключевые слова: abstract, app, book, business, certificate, college, communication, computer, concept, course, design, distance, education, elearning, element, flat, global, globe, graduation, icon, idea, illustration, information, internet, knowledge, learning, lesson, library, literature, mobile, network, online, people, professional, research, school, science, set, sign, student, study, symbol, teaching, technology, training, tutorial, university, web, world,