The document discusses robots and their components. It describes three levels of robots from simple to complex based on their capabilities. Simple robots perform automated tasks, middle robots are programmable and do work humans normally do, and complex robots are reprogrammable and suited for a variety of manufacturing tasks. The main parts of a robot are also identified as the manipulator, pedestal, controller, end effectors, and power source. The manipulator mimics the human arm. The controller acts as the brain to issue instructions. End effectors allow robots to perform tasks like spraying or welding. Power sources include electric, pneumatic or hydraulic options.