TreasuryDirect
TreasuryDirect is a website run by the Bureau of the Fiscal Service under the United States Department of the Treasury that allows US individual investors to purchase Treasury securities such as Treasury Bills directly from the U.S. government. Its website allows money to be deposited from and withdrawn to personal bank accounts, and allows rolling repurchase of securities as the currently held items mature.
TreasuryDirect offers product information and research across the entire line of Treasury Securities, from Series EE Savings Bonds to Treasury Notes. New TreasuryDirect accounts offer Treasury Bills, Notes, Bonds, Inflation-Protected Securities (TIPS), Floating Rate Notes (FRN's), and Series I and EE Savings Bonds in electronic form in one account.