UAV stands for Unmanned Aerial Vehicle and it covers all remotely controlled machines that are also known quadcopters used by the US air force. These machines are mainly used by military and police officers to carry out an operation where a manned aircraft seems impractical or too risky. Unmanned aircrafts are not new; they have been in use since the World War I. However, at that time the control was mechanical and the aircraft could only go as far as the fuel would allow. Later on, devices that could be controlled with the help of radio or infra-red technology were developed. These devices became the predecessors of the modern quadcopters that employs integrated circuit or computer chips and can be programmed to fly for a definite time period in a definite direction fulfilling a definite purpose. This design gave rise to the latest quadcopters that are available on the market for hobbyists of all ages who love to fly drones.