I was just trying to think what the difference is between these. Except for UAV, the terms are tossed back and forth here on various threads, seemingly without regard to "just what do they mean" Does "drone" mean multicopter? Or does that include fixed wing, like the Predator Drone? And there are some that are autonomous. Turn them loose, they fly away, and come back some time later. I would not classify those as "RC". The military uses the term "UAV". I don't know enough about then to say how many are autonomous, but do know that there are some that are "RC", like from 10,000 miles away. Some come back, and some go "boom" when they reach their destination.