Robotics is the study and application of robot technology. The term "robot" was first coined in 1920 and comes from the Czech word for forced labor. There are several types of robots including industrial robots used in manufacturing, mobile robots that can move autonomously, educational robots used in classrooms, and domestic robots for household tasks. The main components of a robot include its manipulator or rover body, end effectors for interacting with the environment, actuators that provide movement, sensors for awareness of surroundings, a controller for coordination, and software for operation. Robots are used for a variety of purposes like dangerous, repetitive, or impossible tasks that can assist or replace humans.