Why UAVs are called drones?

Question

Why did Aeroflot Flight 593, a "Russian Airlines" Airbus A310 passenger airliner, crash into a hillside in Kemerovo Oblast on 23 March 1994, killing all 75 passengers and crew?

Answer 1

UAV is an acronym for Unmanned Aerial Vehicle, but all UAVs are not drones. Mostly sophisticated and defense use UAVs are called drones.

Drone means a flying robot, and is we see the todays defense use UAV they confirm to this definition as they are no more sophisticated than a simple radio controlled aircraft being controlled by a human pilot at all times. Mostly they have built-in control and/or guidance systems to perform low level human pilot duties such as speed and flight path stabilization, and simple prescribed navigation functions such as waypoint following.

Answer 2

The UAV is an acronym for Unmanned Aerial Vehicle, which is an aircraft with no pilot on board. UAVs can be remote controlled aircraft (e.g. flown by a pilot at a ground control station) or can fly autonomously based on pre-programmed flight plans or more complex dynamic automation systems.

The full form of UAVS is Unmanned Aircraft Vehicle System.

UAVs are currently used for a number of missions, including reconnaissance and attack roles.