There are two types of pneumatic systems currently used in naval aircraft
on buses for brakes and in engineerring
Hydrolic
Yes there is. Pneumatic valve springs. They are metal bellows that have air in them. Their use is in replacing metal wire springs in a high-speed combustion engine. An example would be formula one engines.
Pneumatic = Air! There are brake systems that use a combination of both pneumatic and hydraulic components. In those combination braking systems you would use the hydraulic brake fluid that the manufacture specifies.
Usually ordinary air is used in a pneumatic system.
Pneumatic, use of air. Hydraulic, use of oil or other fluid.
Pneumatic tube systems today are most seen at the drive-through windows of banks. Pneumatic tubes use pressured air to push a sealed object through the system. how do pneumatic truck trailers work?
The pneumatic system controlled by electronic systems.
Pneumatic braking system utilizes compressed air to stop the motion in vehicles.
Sand blasting uses air pressure as an ejector within the blasting process. This is how the pneumatic system is used in a pneumatic sand or paint blaster.
both pneumatic & hydraulic systems are applications of fluid powers
human respiratory uses air pressure like pneumatic system does