CPU

From EVE Wiki

The CPU or Central Processing Unit is the core of all computer systems in a ship and control all the powered modules. Each ship has a limited amount of CPU power that can be given to fitted modules. If a pilot adds too many powered modules to his ship, some of them will not be active. A pilot can view the total amount of CPU capacity and the amount remaining in the Fittings screen.

A ship's base CPU capacity can be increased by adding CPU Upgrade modules as well as training skills such as Electronics and Weapon Upgrades.