etmology in usa

In 1507, German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere "America" after Italian explorer and cartographer Amerigo Vespucci.The former British colonies first used the country's modern name in the Declaration of Independence, which was the "unanimous Declaration of the thirteen united States of America" adopted by the "Representatives of the united States of America" on July 4, 1776.
The current name was finalized on November 15, 1777, when the Second Continental Congress adopted the Articles of Confederation, the first of which states, "The Stile of this Confederacy shall be 'The United States of America.' " The short form United States is also standard. Other common forms include the U.S., the USA, and America.

Colloquial names include the U.S. of A. and the States. Columbia, a once popular name for the United States, was derived from Christopher Columbus. It appears in the name "District of Columbia".The standard way to refer to a citizen of the United States is as an American. Though United States is the formal adjective, American and U.S. are the most common adjectives used to refer to the country ("American values," "U.S. forces").

Wall Street is home to the New York Stock Exchange.In 2005, 155 million persons were employed with earnings, of whom 80% had full-time jobs. The majority, 79%, were employed in the service sector.[1] With about 15.5 million people, health care and social assistance is the leading field of employment. About 12% of workers are unionized, compared to 30% in Western Europe. The World Bank ranks the United States first in the ease of hiring and firing workers.bettween 1973 and 2003, a year's work for the average American grew by 199 hours.