Ключевые слова: abstract, background, blackboard, box, brain, bright, bulb, business, color, concept, creative, design, drawing, education, flat, graphic, head, human, icon, idea, ideas, illustration, innovation, inspiration, intelligence, isolated, light, man, mind, minded, open, power, problem, profile, science, sign, silhouette, simple, smart, solution, symbol, technology, think, thinking, white, work,