This document discusses the components and functions of robotic arms. It describes that a typical robotic arm is made up of metal segments joined by joints that are connected to servo motors which allow the arm to be positioned accurately. The arm resembles a human arm with equivalent parts like a shoulder, elbow, and wrist. Modern robotic arms are computer controlled and can perform tasks like welding, gripping, and assembly with great precision. Robotic arms have various industrial and military applications.