Anti-lock Braking System (ABS) is a technology that prevents wheel lock-up and skidding when braking hard. BMW's proprietery ABS system used on its motorcycles is available in two types: Partial Integral and Fully Integral.
Partial Integral ABS:
Partial Integral ABS applies both the front and rear brakes when only the front brake lever is pressed, but applies only the rear brake when the rear brake lever is pressed.
Fully Integral ABS:
Fully Integral System applies both the front and rear brakes when either the front or rear brake lever is pressed independently.