A drone is an aircraft or flying device which does not have a human pilot onboard.
Officially named an unmanned aerial vehicle (UAV), a drone can be flown autonomously by on-board computers or via remote control by a human pilot.
The drone originated in the military and were used for missions deemed too risky for humans. The history of the drone can be charted back to as early as 1849 when Austria sent unmanned, bomb-filled balloons to attack Venice.
Although drones have their origins in the military, the use of such devices in commercial, scientific, recreational, agricultural, and other applications is expanding. In fact, as per 2015 figures, there are now more civilian drones than military drones.