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.

You get 40 points to distribute among the 7 statistics when creating a character (not taking traits into account).

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 perk.

Wearing power armor raises your Strength by 3 and advanced power armor (normal and Mk II) raise by 4.

Luck may be increased by 2 or decreased by 1 by speaking with the Hubologist in NCR and getting a zeta scan. Alternatively, the Hubologists in San Francisco can perform a zeta scan which either increases Luck and Intelligence by 1 or decreases luck by 1. You can only get one zeta scan, so choose wisely.

The mirrored shades increase Charisma by 1 when held in either hand slot.