Ключевые слова: alphabet, apple, art, astronomy, blackboard, book, bus, certificate, chemistry, college, computer, design, diary, diploma, document, education, flat, geography, globe, graduation, hat, icon, icons, knowledge, laptop, learn, library, mathematics, microscope, monitor, notebook, palette, pen, pencil, presentation, reading, ruler, school, science, set, sign, sport, stationery, student, study, studying, symbol, university, web,