SBI is India's largest bank that was formed through the merger of Bank of Calcutta and Bank of Maharashtra to become Imperial Bank, which was then nationalized in 1955. SBI started with 480 offices across India to promote saving and lending. Over the past 200 years, SBI has transformed from a public sector bank into a competitive institution providing a variety of banking services including mobile banking, pension funds, custodial services, and general insurance. Currently, SBI is owned by the Government of India, employs over 200,000 people, and has over $32 billion in assets.