Ключевые слова: ammeter, book, classroom, collection, college, design elements, diploma, discharge, doodle, drawing, education, flask, graduation, graphic, hand drawn, hat, high school, icon, icon set, icons, illustration, knowledge, learning, light bulb, lightning, literature, magnet, math, mathematics, modern, molecules, notebook, optics, physics, pictogram, research, scales, school, science, scientific, scientist, set, sketch, student, study, symbol, teacher, technology, university,