01 – Drone
Officially known as the unmanned aerial vehicle (UAV), the drone is an aircraft without a human pilot aboard. Compared to manned aircraft, drones are often preferred for missions that are too “dull, dirty, or dangerous” for human to carry out. They are used mostly for military assignments, although their use is expanding in commercial, scientific and recreational. Civilian drones now vastly outnumber military drones, with estimates of over a million sold by 2015.