Pneumatics is a branch of mechanics that deals with the mechanical properties of gases. It works with the study of pressurized gas that produces mechanical motion, and the application of such gases to produce motion. Systems based on pneumatics are found in factories that deal with compressed air and inert gases. Energy produced by pneumatic systems can be more flexible, less costly, more reliable and less dangerous than some actuators and electric motors.
Though most of us do not realize it, we are surrounded by systems based on pneumatics. Below are some examples.
As you can see, you will likely encounter some type of pneumatic system on a regular basis in the course of your everyday life.