A Wingcopter aerial delivery drone.
AN OVER-ALL Atomics MQ-9 Reaper, a hunter-killer surveillance UAV
A DJI Phantom quadcopter UAV for commercial and recreational aerial photography
A DeltaQuad VTOL fixed wing surveillance UAV
UAV launch from an air-powered catapult
An unmanned aerial vehicle (UAV) (or uncrewed aerial vehicle, often called a drone and rarely as an uninhabited aerial vehicle or unoccupied aerial vehicle) can be an aircraft with out a human pilot up to speed and a kind of unmanned vehicle. UAVs certainly are a element of an unmanned aircraft system (UAS); such as a UAV, a ground-based controller, and something of communications between your two. The flight of UAVs may operate with various levels of autonomy: either under handy remote control by a human operator, autonomously by onboard computers  or piloted by an autonomous robot.
In comparison to crewed aircraft, UAVs were at first used for missions too “dull, dirty or dangerous” for humans. While they originated mostly in military applications, their use is rapidly expanding to commercial, scientific, recreational, agricultural, and other applications, such as for example policing and surveillance, product deliveries, aerial photography, infrastructure inspections, smuggling, and drone racing. Civilian UAVs now vastly outnumber military UAVs, with estimates of over a million sold by 2015.
Multiple conditions are being used for unmanned aerial vehicles, generally discussing the same concept.
The word drone, more widely employed by the general public, was coined in mention of the first remotely-flown target aircraft used for practice firing of a battleship’s guns, and the word was first used in combination with the 1920s Fairey Queen and 1930’s de Havilland Queen Bee target aircraft. Both of these were followed operating by the similarly named Airspeed Queen Wasp and Miles Queen Martinet, before ultimate replacement by the GAF Jindivik