Public sector undertakings (PSUs) in India are owned, managed, and controlled by the government. They have evolved significantly since India's first five-year plan in 1951, with the number of PSUs growing from 5 to over 200 currently. PSUs can be statutory corporations created by acts of parliament, departmental enterprises, or government companies. In 2006-07, PSUs contributed around 11% of India's total GDP and employed over 25% of industrial workers. The top five PSUs by net income in 2006-07 were ONGC, NTPC, SAIL, IOC, and SBI. PSUs help develop infrastructure, promote self-sufficiency, employment, and