The document defines the money market as a market for short-term financial assets that are close substitutes for money and facilitate exchanges in primary and secondary markets. It discusses various money market instruments like treasury bills, commercial papers, certificates of deposit, and repurchase agreements that have maturities of one year or less. The document also outlines the structure of the organized Indian money market including key participants like the Reserve Bank of India, commercial banks, and development banks. It notes some purposes of the money market like providing parking for short-term funds and enabling central bank intervention.