Beginning of Essay
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. ....

Middle of Essay
.... and they are being developed to aid people who have lost the use of their limbs. These devices, however, are for the most part quite different from the androids, or humanlike robots, and other robots of fiction. They rarely take human form, they perform only a limited number of set tasks, and they do not have minds of their own. In fact, it is often hard to distinguish between devices called robots and other modern automated systems. Although the term robot did not come into use until the 20th century, the idea of mechanical beings is much older. Ancient myths and tales talked about walking statues and other marvels in human and animal form. ....