Dollar The US dollar is the national currency of the United States of America. There are hundred cents in a dollar. A fifty cent coin is called a half dollar. A twenty-five cent coin is called a quarter. A ten cent coin is called a dime and a five cent coin is called a nickel. One cent is called a penny. Dollar notes are available in 1,5,10,20,50 and $100 denominations.

During the 18th century, a currency called the "Spanish dollar" was in circulation in the Spanish colonies and was the backbone of finance and commerce in America during that time. It was because of the "Spanish dollar" that the US national currency was later named the dollar. During the American Revolution of 1775, the importance of "Spanish currency" coins increased, and the revolutionaries demanded that each colony should have its own official currency, which would also be supported by the Continental Congress. The word dollar, however, was in use as a slang in the English language before 200 years before the American Revolution, which was mentioned in many of Shakespeare's plays. The "Spanish Dollar" was in circulation in the Thirteen Colonies, which later became the United States. In Virginia, the "Spanish dollar" was also recognized as legal tender.

In the early days of the United States, the "dollar" was understood to be a coin minted by Spain and was called the "Spanish milled dollar". These coins were in use as the standard currency in the country at that time. On April 2, 1792, Alexander Hamilton, then Secretary of the Treasury, presented a report to the National Congress by scientifically determining the amount in silver "Spanish milled dollar" coins (which were then in circulation). As a result of this report, the dollar was defined as a unit of measure whose value was equal to 4/16th of 371 annagrams of pure silver, or 416 annagrams of standard silver.

The history behind the dollar sign ($) is that the United States of America was added to represent the US dollar to denote the American currency.

These late 18th and early 19th century manuscripts show that the s gradually evolved to be written above the "$" mark, developing into the equivalent of the "$" sign, and to refer to this new symbol as the US dollar as well. This was once the currency was adopted by the United States in 1785.

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