The science and technology of sending and receiving information such as sound,visual images or computer data over long distances through the use of electrical, radio,or light signals,using electronic devices to encode the information as signals and to decode the signals as information.
Android is an operating system based on the Linux kernel, and designed primarily for touchscreen mobile devices such as smartphones and tablet computers.
iPhone, including the most advanced mobile OS in its most advanced form and great apps that let you be creative and productive.
A quadcopter, also called a quadrotor helicopter, quadrotor,is a multirotor helicopter that is lifted and propelled by four rotors. Quadcopters are classified as rotorcraft, as opposed to fixed-wing aircraft, because their lift is generated by a set of revolving narrow-chord airfoils. .