Hydraulic fluid is a type of liquid used to transmit power in hydraulic systems. It is important because it creates pressure when it is forced through hoses and pipes, allowing machines and equipment to move and function smoothly. Full definition
Power steering fluid is a sub type of hydraulic fluid. (en.wikipedia.org)
This suspension system on your vehicle uses hydraulic fluid that supports the vehicle and different valves to control the active suspension. (yourmechanic.com)
It also incorporates electronic stability control, traction control and an electric motor to pump hydraulic fluid into one unit. (autoline.tv)