Pneumatics utilize compressed air to generate mechanical motion, operating valves, cylinders, and actuators. Hydraulics, on the other hand, use pressurized fluid to transmit power and control motion in heavy machinery and equipment. Proper maintenance of pneumatic and hydraulic systems is crucial for ensuring optimal performance, efficiency, and safety. MRO in this domain involves regular inspection, repair, and replacement of components like seals, valves, hoses, and fittings, preventing leaks and breakdowns.