State Bank of India (SBI) is India's largest commercial bank. SBI traces its origins to banks established in India in the early 19th century. It was formed in 1955 by the Government of India by nationalizing the Imperial Bank of India. Today, SBI has over 22,000 branches across India and five associate banks. It has over 200 million customer accounts and aims to provide banking services to rural and semi-urban areas of India. SBI continues to be majority owned by the Government of India.