The 1948 Industrial Policy Statement established four categories of industries in India: 1) Public sector industries including arms, ammunition, atomic energy and railways. 2) Public-private industries including coal, iron and steel, aircraft, shipbuilding and others that would be taken over by the government after 10 years. 3) Controlled private industries including automobiles, machinery and chemicals that would be regulated by the government. 4) Private industries where the government could keep checks but were otherwise privately owned. The policy aimed to develop small industries for employment while also allowing private participation and control over foreign capital.