The State Bank of India implemented the largest centralized core banking system in history to modernize its technology and remain competitive. It selected Tata Consultancy Services to implement the TCS BaNCS system across SBI's over 14,600 branches and affiliate banks, involving converting approximately 140 million accounts. The project was highly successful and expanded in scope from an initial 3,300 branches to include all SBI branches. The implementation established SBI as a leader in offering innovative products and services through advanced technology.