HELPING THE OTHERS REALIZE THE ADVANTAGES OF D20

An armor bonus applies to Armor course and is granted by armor or by a spell or magical effect that mimics armor. Armor bonuses stack with all other bonuses to Armor Class (In spite of pure armor bonuses) except other armor bonuses. An alchemical bonus is granted by the use of a nonmagical, alchemical compound like antitoxin. Armor Bonus ClassToo