Ключевые слова: black, brain, bright, bulb, business, button, cog, concentration, creative, design, drawing, education, face, flat, gear, glow, glyph, graphic, head, human, icon, idea, illustration, imagination, intelligent, knowledge, lamp, learning, life, light, lightbulb, line, logo, mind, monochrome, network, outline, pictogram, science, sign, simple, skill, symbol, think, thinking,