A public sector company provides services on behalf of the government. These include organizations, such as schools, public works departments and prisons. The government itself, including all elected officials and their assistants and administrators, is part of the public sector.
There are two types of public sector companies. The primary level is funded directly by government funds. In the United States, these include the armed forces, law enforcement agencies, public works agencies and schools. Secondary level public sector companies are publicly owned corporations in which the government retains a majority of the stock. In the United States, postal services and public transportation are secondary level public sector companies that are expected to be self-supporting in the manner of private sector companies.