Back when i had my training in a power generation station. I was exposed to a lot about the pneumatic system. We do power most of the hand tools that require power with air. There are some control valves (e.g. a diaphragm valve) that are operated using air as well.

The pneumatic system has really countless of application. Another is in buses, where they control the opening and closing of doors. Some big electric generators required air for stating them.

Well done sir!