The Parrot AR.Drone is a discontinued remote-controlled flying quadcopter, built by the French company Parrot.
AR.Drone pre-production prototype
AR.Drone 2.0 in flight with outdoor hull
AR.Drone 2.0 in flight with indoor hull
AR.Drone application HUD
A quadcopter, also called quadrocopter, or quadrotor is a type of helicopter or multicopter that has four rotors.
A DJI Phantom quadcopter drone in flight
Typical racing quadcopter with carbon fiber frame and FPV camera
Quadcopter coaxial – OnyxStar FOX-C8 XT Observer from AltiGator
de Bothezat helicopter, 1923 photo