COMPAQ: Compaq 320, Compaq 321, Compaq 325, Compaq 326, Compaq 420, Compaq 421, Compaq 620, Compaq 621 **HP: HP 420, HP 421, HP 425, HP 4320t, HP 620, HP 625, ProBook 4320s, ProBook 4321s, ProBook 4325s, ProBook 4326s, ProBook 4420s, ProBook 4421s, ProBoo