Ключевые слова: abstract, art, attach, background, button, chain, clip, color, colorful, communication, concept, connection, contour, cooperation, design, element, flat, hyperlink, icon, illustration, image, interface, internet, isolated, joined, line, linear, lineart, link, linked, metal, network, object, outline, part, protection, safety, security, separation, sign, single, strength, symbol, system, togetherness, web,