Ключевые слова: achievement, airplane, art, bag, beaker, board, business, cap, case, chalk, chalkboard, check, checklist, chemistry, color, colorful, computer, contour, degree, diploma, education, file, fire, flask, fly, geometry, graduation, icon, idea, illustration, isolated, laboratory, lamp, light, line, linear, mobile, monitor, office, outline, phone, plane, pop, popart, school, set, test,