There have been many variations of and names given to hydraulic brake booster systems. The most common ,names are the hydro-boost system produced by Bendix and the Power master system produced by General Motors. The Power master system is a little different than the rest in that it uses a self-contained hydraulic booster that is built directly onto the master cylinder. Instead of relying on the power-steering pump for hydraulic pressure as is done in the other systems, the Power master has its own vane pump and electric motor to provide the hydraulic pressure required for booster operation.