Ключевые слова: abstract, art, background, banner, book, cloud, computer, concept, design, distance, e, education, elearning, flat, flyer, icon, idea, illustration, internet, isometric, isometry, knowledge, laptop, learn, learning, lettering, letters, line, mobile, notebook, online, phone, school, science, smartphone, student, study, symbol, teaching, technology, training, typo, typography, university, web, website, word,