What Are the Main Components of Robots?

Components of Robots were not used in literature until Karel Capek's play "Rossum's Universal Robots" in 1921. The first motion picture to include a robot that looked like a human was "Metropolis" in 1926. Robots are now a common sight in our daily lives. Components of Robots now work in our warehouses and manufacturing facilities; explore far-off planets; assist us in inspecting our infrastructure sites, and even help us build entirely new ones. But how do robots truly function?