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An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without a human pilot on board. Its flight is controlled either autonomously by computers in the vehicle, or under the remote control of a pilot on the ground or in another vehicle. There are a wide variety of drone shapes, sizes, configurations, and characteristics. Historically, UAVs were simple remotely piloted aircraft, but autonomous control is increasingly being employed.

A company is an association or collection of individuals people or

Walking (also known as ambulation) is one of the main gaits of locomotion among legged animals, and is typically slower than running and other gaits. Walking is defined by an inverted pendulum gait in which the body vaults over the stiff limb or limbs with each step. This applies regardless of the number of limbs - even arthropods with six, eight or more limbs. The word walk is descended from the Old English wealcan

Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms. The age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years. Fossil fuels contain high percentages of carbon and include coal, petroleum, and natural gas.

A bicycle, often called a bike (and sometimes referred to as a

Funding is the act of providing resources, usually in form of money, or other values such as effort or time, for a project, a person, a business, or any other private or public institutions. The process of soliciting and gathering fund is known as fundraising. Sources of funding include credit, donations, grants, savings, subsidies, and taxes.

Inalienable fundamental rights to which a person is inherently entitled

Surveillance is the monitoring of the behavior, activities, or other changing information, usually of people for the purpose of influencing, managing, directing, or protecting. Surveillance is therefore an ambiguous practice, sometimes creating positive effects, at other times negative. It is sometimes done in a surreptitious manner.

The human brain has the same general structure as the brains of other mammals, but is larger than any other in relation to body size. Large animals such as whales and elephants have larger brains in absolute terms, but when measured using the encephalization quotient which compensates for body size, the human brain is almost twice as large as the brain of the bottlenose dolphin, and three times as large as the brain of a chimpanzee.

A flying car or roadable aircraft is an aircraft that can also travel along roads. All the working examples have required some manual or automated process of conversion between the two modes of operation. A slightly different concept that is sometimes referred to as a