Help ACS:
The Auxiliary Combat Skills are tested at different times during any attack and will allow your character to develop a unique fighting style.
They are: OFFENSIVE PARRY AIM BLOWS DARING CONTROL ATTACK SPEED
Someone with a high skill in DARING will tend to be a much wilder fighter than someone with high skill in OFFENSIVE, who will tend towards very controlled blows.
AIM BLOWS affects how accurate you are in hitting specific targets on your foe. ATTACK SPEED affects your swinging frequency and your rate of fatigue.
PARRY affects how often you block, while CONTROL affects how well you control your opponent's weapon once you have blocked it.
For related topics, see: help alloc, help set, help combat, help aim, help slots.