The full form of PSU is the ‘Public Sector Undertaking.’ PSUs are the corporations owned by the Indian government. It was created with the aim of undertaking the commercial projects under the banner of the Government  of India. Such companies are more focussed towards the overall development of the country instead of profit-making. They also have a major contribution towards improving the economy of the country. In a PSU, around 51% stakes are owned by the Central or State governments. The PSUs are audited by the Controller and Auditor General (CAG) of India. The PSUs have three categories: Public Sector Banks (PSBs), Public Sector Enterprises (PSEs) and Central Public Sector Enterprises (CPSEs). Few examples of PSUs are Oil and Natural Gas Corporation (ONGC), State Bank of India (SBI), Coal India Limited (CIL), National Thermal Power Corporation (NTPC), Food Corporation of India (FCI), etc.

Another full form of PSU is Power Supply Unit. It is the integral hardware component of a computer. The function of PSU is to supply optimum power to a computer’s integral components. With the help of PSU, high voltage alternating currents are converted into low voltage direct current which is steady in nature. Due to this, the internal components of a computer remain safe.