Just for the sake of filling in all the blanks, you may note the mention of the stability augmentation system that can apply braking to one or more wheels. The majority of braking and stability systems use only the braking effort applied by the driver by pressing down on the brake pedal. Systems in which the vehicle itself can apply the brakes are rather uncommon.
Active systems, in which the vehicle itself applies braking are a departure from the most common methods used in Anti-Lock Brake systems, which can only release some part of the braking applied by the driver, at one or more wheels when it determines that a wheel is slipping. With most ABS systems, there is no braking unless you hit the pedal. For the ABS system to work, it must drain off the pressure to one or more wheels, which quite obviously reduces the total braking applied.
Under conditions where slip occurs, and the ABS system actually does something, it is very important that you slam hard enough on the brakes so that the ABS system has "extra effect" available to spare what must be thrown away to keep the wheel with poor road adhesion from slipping.
Most ABS systems slightly increase braking distance (for panic stops) under most conditions, but that is considered safer than permitting a skid in which the vehicle might go uncontrollably in unwanted directions.
Theoretically, if you push too hard on the pedal, all the brakes will be "chattered" equally by the ABS, and you'll still stop about as fast as possible without losing control. If you don't push hard enough, the release of pressure to one wheel may drain pressure from the others, and stopping distance can be very greatly - and somethimes unexpectedly - increased.
At least one auto recently included a system in which, when the brakes were applied normally, but one or more wheels were "released" by the ABS, the control system would provide external power to slam the brake pedal "to the floor" to make sure that full ABS control was available. I'm not sure that system still exists, since there were some driver complaints that it was "too aggressive" in common driving situations.
A vehicle that can apply its own brakes, as in the above "agumented ABS" or in the wheel-braking stability management system mentioned in the previous post, is as yet rather rare. (It would be expected that the Ford that is able to parallel park itself without driver assistance would have that capability, although aggressive braking shouldn't be needed; but I haven't seen details.)