The image usually thought of by the word robot is that of a mechanical being, somewhat human in shape. Common in science fiction, robots are generally depicted as working in the service of people, but often escaping the control of the people and doing them harm. The word robot comes from the Czech writer Karel Capek's 1921 play “ R.U.R.” (which stands for "Rossum's Universal Robots"), in which mechanical beings made to be slaves for humanity rebel and kill their creators. From this, the fictional image of robots is sometimes troubling, ....