Nationalization is the process of transforming privately-owned assets into public assets by bringing them under the public ownership of a national government or state. Nationalization contrasts with privatization and with demutualization. When previously nationalized assets are privatized and subsequently returned to public ownership at a later stage, they are said to have undergone renationalization. Industries often subject to nationalization include telecommunications, electric power, fossil fuels, railways, airlines, iron ore, media, postal services, banks, and water, and in many jurisdictions such entities have no history of private ownership.