Ключевые слова: app, background, blue, book, brushstroke, business, button, communication, computer, concept, design, digital, e, ebook, education, elearning, electronic, graphic, icon, icons, illustration, information, internet, knowledge, laptop, learn, learning, library, literature, logo, online, reader, school, science, sign, student, study, studying, symbol, teaching, technology, training, transparent, ui, university, web, website,