The single most important component in your laptop is its central processing unit, or CPU. Essentially the brain of a computer, this processor has a huge impact on what applications you can run, how smoothly they run, and how many you can run at the same time.The two biggest players in the CPU arena are Intel and AMD. Of those, Intel's CPUs comprise the lion's share of the market currently. Most laptops currently have dual-core CPUs, such as Intel's Core 2 Duo. Low-cost Netbooks, however, use single-core CPUs, such as Intel's Atom.
Computer Processor Review