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Other currently expected AuT technologies include home robotics (e.g., machines that provide care for the elderly, [9] [10] infirm or young), and military robots [11] [12] (air, land or sea autonomous machines with information-collection or target-attack capabilities). AuT technologies share many common traits, which justify the common notation.
Countries with at least one autonomous area. This list of autonomous areas arranged by country gives an overview of autonomous areas of the world. An autonomous area is defined as an area of a country that has a degree of autonomy, or has freedom from an external authority.
Image:Blank US Map with borders.svg, a blank states maps with borders. Image:BlankMap-USA.png, a map with no borders and states separated by transparency. Image:US map - geographic.png, a geographical map. On Wikimedia Commons, a free online media resource: commons:Category:Maps of the United States, the category for all maps with subcategories.
The United States of America is a federal republic [1] consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major territories, and various minor islands. [2] [3] Both the states and the United States as a whole are each sovereign jurisdictions. [4]
The first documented use of the phrase "United States of America" is a letter from January 2, 1776. Stephen Moylan, a Continental Army aide to General George Washington, wrote to Joseph Reed, Washington's aide-de-camp, seeking to go "with full and ample powers from the United States of America to Spain" to seek assistance in the Revolutionary War effort.
A physiographical map of the contiguous 48 states of the U.S. and indicating the age of the exposed surface and the type of terrain An aerial photo over northern Ohio; much of the central United States is covered by relatively flat, arable land. Within the continental U.S. there are eight distinct physiographic divisions.
Although distant from America's geographic center and from each other—and with distinctive flora and fauna, land use history, and individual forest issues—these rich and diverse ecosystems share a common bond of change and challenge. [174] Forests in the U.S. territories are vulnerable to invasive species and new housing developments. [174]
The federal government of the United States (U.S. federal government or U.S. government) [a] is the common government of the United States, a federal republic located primarily in North America, comprising 50 states, five major self-governing territories, several island possessions, and the federal district (national capital) of Washington, D.C ...