The character system in Fallout is called the SPECIAL system, and it is practically identical - although there are some additions and minor changes - to the system in Fallout, which also used SPECIAL.

It stands for Strength, Perception, Endurance, Charisma, Intelligence, Agility and Luck, ie SPECIAL. These represent the basic stats of the character.

Interplay also put in Skills, Perks and Traits.