This article is from the What Every Investor Should Know.
The U.S. Government also issues a variety of debt securities, including Treasury bills (commonly called T-bills), Treasury notes, and U.S. Government agency bonds. T-bills are sold to selected securities dealers by the Treasury at auctions. Investors can buy all three types, without paying a commission, directly from a Federal Reserve Bank or the Bureau of the Public Debt. Government securities can also be purchased from banks, government securities dealers, and other broker-dealers.
 
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