Ключевые слова: app, book, business, certificate, college, communication, computer, concept, course, design, digital, distance, ebook, education, elearning, flat, graduation, icon, idea, illustration, information, internet, knowledge, laptop, learning, library, line, media, mobile, object, online, pictogram, school, science, seminar, set, sign, social, student, study, symbol, teaching, technology, training, tutorial, university, video, web, webinar,