Armor Class

Armor provides protection by reducing the chance that a character is attacked successfully (and suffers damage). Armor does not absorb damage, it prevents it. A fighter in full plate mail may be a slow-moving target, but penetrating his armor to cause any damage is no small task. Armor Class is measured on a scale from 10, the worst (no armor), to -10, the best (very powerful magical armors). The lower the number, the more effective the armor. Shields can also improve the AC of a character (see "Shields" in Chapter 6: Money and Equipment). Abilities and situations can also affect a character's Armor Class. High Dexterity gives a bonus to Armor Class, for example. But even a character with a Dexterity bonus can have this bonus negated if he is attacked from the rear.