Robot is a system that contains sensors, control systems, manipulators, power supplies and software working together to perform tasks. Designing, building, programming and testing robots requires expertise in various fields including physics, engineering, mathematics and computing. Robots can perform tasks instead of humans such as getting food or moving objects, but they are limited by their design and cannot perform tasks outside of what they were designed for such as going into space. The history of robotics began in 320 BC and has advanced through developments in artificial intelligence, industrial robotics, and research areas like robotic arms used in car manufacturing and Mars rovers.