In India, the Reserve Bank of India (RBI) uses different measures of money supply. M₁ is the narrowest measure, including Currency with Public, Demand Deposits with banks, and Other Deposits with RBI. M₂ includes M₁ plus savings deposits with post office savings banks. M₃ includes M₁ plus Net Time Deposits of banks (this is also known as Broad Money). M₄ includes M₃ plus all deposits with post office savings organisations (excluding National Savings Certificates).