Ключевые слова: abstract, app, book, business, collection, college, computer, concept, course, design, digital, distance, download, ebook, elearning, flat, graduation, icon, illustration, information, internet, knowledge, learning, library, line, media, mobile, object, online, school, science, set, sign, social, student, study, symbol, tablet, technology, thin, training, tutorial, university, video, web, webinar,