| A | B |
| feedback | information sent from a robot sensor to the robot controller |
| controller | programmable computer device that coordinates the operations of a robot (the robot 'brain") |
| end arm tool | the "tool" at the end of a robot arm (drill, spray nozzle, saw, gripper, welding rod, etc.) |
| sensor | a device that monitors conditions (light, heat, motion, pressure, etc.) and sends an electronic signal to the robot controller |
| arm | part of the robot that positions the end effector |
| drive | device that "powers" the movable parts of a robot |
| degree of freedom | an axis or movable "joint" in a robot mechanism |
| program | a set of instructions written in code |
| sensor | part that sends info to the controller unit |
| compiler | part of the program that ensures functionality |