Ключевые слова: accounting, art, board, bright, business, button, class, classroom, color, colorful, contour, design, display, drawing, education, equipment, eraser, glowing, icon, illustration, isolated, lecture, light, line, linear, mathematics, neon, object, office, outline, person, pictogram, pointer, presentation, school, seminar, set, sign, simple, speaker, speech, study, symbol, training, write,