Robotics is the field that deals with the design, construction, operation, and application of robots through the integration of mechanical engineering, electrical engineering, and computer science. The document provides examples of different types of robots including industrial robots like Puma and Baxter used in factories, military robots like TALON, snake robots, rolling robots, educational robots like SCORBOT-ER 4u, and humanoid robots like TOPIO that can play ping pong. The overall focus is on introducing different areas and applications of robotics through examples.