Normal damage
From FOnline: Aftertimes
Normal damage refers to physical damage done by fists, nonelectric melee weapons, rocks, and bullets (all Small Guns and most Big Guns)
The Normal damage resistance is a combat statistic. Any normal damage done to a player or critter is first reduced by a percentage (normal Damage Resistance) and by a set amount (normal Damage Threshold).
Every armor has a DR and DT for each damage type and it is mostly through armors that a player can increase his DR and DT statistics.
Other damage types: