Robots today have controllers that are run by programs - sets of instructions written in code. In the future, controllers with artificial intelligence, or AI could allow robots to think on their own, even program themselves. This could make robots more self-reliant and independent. This information is almost always digital, or stored in the binary form of 1's and 0's. Most drives are powered by air, hydraulics, or electricity.
Some robots can change end-effectors, and be reprogrammed for a different set of tasks.
If the robot has more than one arm, there can be more than one end-effector on the same robot, each suited for a specific task. A test to answer a question or illustrate a point, usually conducted under controlled conditions. A person who travels to a distant place in search of new information and discovery. This relatively new branch of science explores the possibilities of building things at the molecular level- atom by atom. A computer-operated, mechanical body that works on its own to do a variety of jobs.