Multitasking

(Savage Species, page 37, DnD 3.0)

[Monster]

You can perform different tasks with different limbs.

Prerequisite

Improved Multiweapon Fighting, Multiattack, Multiweapon Fighting, DEX 15, INT 15, four or more arms

Benefit

If you have four or more arms, you can use each pair of arms to perform a distinct partial action. All such partial actions occur simultaneously. Thus, you could attack with one or two arms while using a magic item, reloading a crossbow, or casting a spell with two other arms.