CPU, which is sometimes called just "processor", is an abbreviation for Central Processing Unit. That's the core of each and every laptop or computer or web server, since it executes all of the calculations and logical input/output procedures. Though the performance of an Internet site or an application relies on other things too, including the amount of physical memory or the connectivity of the server, the rate at which a certain processor performs determines how soon a program shall be executed. Later-generation processors have a number of cores that can considerably boost their overall power and efficiency, since every core can control a variety of processes individually or a number of cores can take on one process that requires a substantial processing power. Since every single core functions at a specific speed, this architecture can be viewed as numerous individual processors cooperating.