Ключевые слова: 3d, abstract, background, banner, book, bookshelf, brain, business, classroom, computer, concept, conceptual, creative, design, digital, education, elearning, flat, graphic, icon, idea, illustration, info, infographics, information, isometric, knowledge, learning, library, literature, marketing, mobile, network, online, panoramic, people, process, pupil, read, reading, school, science, student, study, tablet, technology, textbook, threedimensional, university, vector, web,