Ключевые слова: abstract, attach, attachment, background, button, chain, chain icon, chain link, communication, computer, concept, connect, connection, cooperation, design, element, external, external link, flat, hyperlink, icon, illustration, image, information, insert, interface, internet, isolated, joined, label, link, link icon, linked, links, network, object, protection, security, share, sign, single, strength, symbol, system, togetherness, web,