Public corporations are established to provide essential services and utilities to the public at minimal cost. They are owned and controlled by the government, and their primary objective is to serve the public interest rather than to make a profit. Examples of public corporations include water boards, electricity companies, transportation agencies, and public hospitals. They are created to ensure that these essential services are available to the public and that they are affordable and accessible to all. Public corporations play a vital role in the development and maintenance of a country's infrastructure and in promoting the welfare of its citizens.