Now you can coordinate complex functionalities for your robot. Your robot can walk, talk, see, hear, and even sense its environment, all at the same time. In the next chapter, you'll learn how to construct robots that can fly, sail, and even go under water.

The ROS is fortunately free and open source. It has a very complex set of functionalities, but if you spend some time learning it, you can start using some of the most comprehensive functionality being developed in robotics research today.