Fallout 2 primary statistics

Overview
The minimum for each primary statistic is 1 and the maximum is 10. These boundaries can never be broken, even with bonuses or maluses. Each statistic directly modifies certain derived statistics. In addition, every skill is tied to a primary statistic. Some perks require certain minimum attribute values as well.

Increasing attributes
You can get a computer in the Brotherhood outpost in San Francisco to perform operations on you to raise Strength, Perception, Charisma and Intelligence by 1, provided you find the associated memory modules.
 * Strength: Red Memory Module - found on the second level of the vault in Vault City
 * Perception: Green Memory Module - found in Military Base 3rd lvl
 * Charisma: Blue Memory Module - found in the Enclave armory in Navarro
 * Intelligence: Yellow Memory Module - found in Sierra Army Depot

In addition, you can increase all S.P.E.C.I.A.L. stats by using the Gain (Statistic) perk.

Wearing Power Armor raises your Strength by 3 and Advanced Power Armor (normal and Mk II) raise by 4.