Strength

Strength is a Primary Statistic in the SPECIAL system.

Strength is a measure of your raw physical power. A high Strength is good for physical characters.

Fallout, Fallout 2, and Fallout Tactics
Modifies: Hit Points, Melee Damage, and Carry Weight

Strength is primarily relevant to two game mechanics: Carry Weight and satisfying the Minimum Strength requirements on weapons. You gain 25 lbs. of carry weight per point of Strength (unless you have the Small Frame trait, in which case it's 15). Also, if you meet the minimum strength requirements of your weapon you do not suffer accuracy penalties with that weapon.

Strength can be permanently increased by 6 points throughout both Fallout and 2.

Buffout and Jet can also temporarily modify Strength.

Fallout 3
Modifies: Melee Weapons, Carry Weight

Siła Сила

Strength can be permanently increased by perk Ant Might obtained as one of the reward from completing quest Those!.