The U.S. federal government releases its own bonds from the treasury and from several federal government firms. Those growing in less than one year are known as T-bills. Bonds that mature in one to ten years are T-notes, and those that take more than 10 years to grow are treasury bonds. Sometimes, you don't need to pay state or regional earnings taxes on the interest they make. Munis finance things like medical facilities, schools, power plants, streets, workplace structures, airports, bridges …