A robot is an automatic machine that does the work of a human. The word robot Was first used in a 1920 Czech play called RUR(Rosstum's Universal Robots) in which mechanical slaves rebel against their human masters. the playwright, Karel Capek, borrowed the word robot from the slavic word robota, meaning a forced labourer. Robots come in many shapes and sizes and have many different abilities. Basically a robot is simply a computer with some sort of mechanical body designed to do a particular job. Usually, it is able to move and has one or more electronic senses These senses are not nearly as powerful as our own senses of sight and hearing. However, scientists and engineers are working 10 hard to improve robots. They are constantly coming up with ways to make them see, hear and respond to the environment around them. Why do we need robots? They are hardworking and reliable. They can do dangerous work or work that is very boring or tiring for humans. They can is work around the clock without complaining and without needing rest, 15 food or vacations And robots can go places that humans cannot, such as the surface of Mars, deep under the ocean or inside the radioactive parts of a nuclear power plant