An artificially intelligent system consists of two main components: the agent and the environment. Every agent operates within its own environment, which may also contain other agents.An agent is anything that can perceive its environment through sensors and act upon that environment using effectors. For example, a human agent uses sensory organs such as the eyes, ears, nose, tongue, and skin to perceive the world, and uses hands, legs, and other body parts to act. Similarly, a robotic agent may use cameras and infrared sensors to perceive its surroundings, while motors and actuators enable it to perform actions.