Optionally piloted vehicle

An optionally piloted vehicle is a type of aircraft that can be flown either with a pilot in it or without a pilot and just fly on its own. It is like a robotic airplane with a computer in it that can be programmed to go where you want it to go and do things like take pictures or drop packages. It is like a very smart drone, but it can be controlled by a pilot or the computer can do it all on its own.