Any modern car has "power brakes" which are brakes powered by your foot on the pedal, but assisted by a vaccuum cylinder (powered by the vaccuum created by your running engine). The only other use of the term is with trailers, where the wheels on the trailer have electric brakes on them.
Anti-lock brakes don't lock the wheels (as their name suggests), rather they quickly lock and release the brakes. Allowing the tires to still spin somewhat lowers the stopping distance (especially on wet/icy pavement), but more importantly it allows the driver to steer the vehicle under hard braking.
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