The United States of America, also referred to as the United States, U.S.A., U.S., America, ¹ or the States, is a federal republic in central North America, stretching from the Atlantic in the east to the Pacific Ocean in the west. It shares land borders with Canada in the north and Mexico in the south, shares a marine border with Russia in the west, and has a collection of districts, territories, and possessions around the world. The country has fifty states, which have a level of local autonomy according to the system of federalism. A United States citizen is usually identified as an American. ¹

The United States traces its national origin to the declaration by thirteen British colonies in 1776 that they were free and independent states. Since the mid- 20th century, it has surpassed all other nations in contemporary economic, political, militaryMilitary (from latin militarius miles "soldier") as an adjective describes anything related to soldiers and warfare. Used as a noun, it is equivalent to Armed force. See also Armed force Martial art Militaria Military history Military rule Military by cou, and cultural influence.

The U.S. was founded under a tradition of government with the consent of the governed under the representative democracyRepresentative democracy comprises a form of democracy and theory of civics wherein voters choose (in free, secret, multi-party elections) representatives to act in their interests, but not as their proxies—i. not necessarily as directed but with enough a model. This model of government ( presidentialA presidential system or a congressional system is a system of government of a republic where the executive branch is elected separately from the legislative. The defining characteristic of a presidential government is how the executive is elected, but ne- congressional) has since been adopted by many other countries, mostly in Central AmericaCentral America is the region of North America located between the southern border of Mexico and the northwest border of Colombia, in South America. Some geographers classify Central America as a large isthmus, and in this geographic sense it sometimes in and South America.

Politics	Business	Finance

Topics: United States Political Government Federal State Parties World...

USA PATRIOT ActThe Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 USA PATRIOT Act H. 1510, Public Law 107-56) is a United States legislative law, enacted in response to the September 11, 2001 Ter	Usability testingUsability testing is a means for measuring how well people can actually use something (such as a web page, a computer interface, a document, or a device) for its intended purpose. If users, or test subjects, have difficulty understanding instructions, man	Usagi TsukinoTsukino Usagi ( Tsukino Usagi , also known as Sailor Moon is the main and title character of the anime and manga Sailor Moon. In the English adaptations, she is known as Serena Tsukino . Due to the series' widespread broadcast in many countries, she is on
USA NetworkThe USA Network is a popular cable TV network based in the United States with about 87 million household subscribers as of 2003. The network shows a variety of original and second-run programming, from syndicated TV series to edited movies. USA also shows	USAMRIIDArmy Medical Research Institute of Infectious Diseases is based at Fort Detrick, Frederick, Maryland. It is commonly called "U Sam Rid", after its acronym. USAMRIID is the only United States Department of Defense laboratory equipped to study highly hazard	Usability engineeringUsability engineering is a subset of human factors that is specific to computer science and is concerned with the question of how to design software that is easy to use. It is closely related to the field of human-computer interaction and industrial desig
USAFFE	Usagi Yojimbo	USAF Art Program
USA Today	Usa, Oita	USA South Athletic Conference
Usability	USA Tuesday Night Fights	Usage of words for eyepieces

Non User