The CPU (Central Processing Unit) is a microchip, ranked as the brains of computers. His job is to interpret the instructions that come from the hardware and software, so the hardware and software can communicate with each other, for example. CPUs have different kinds (Celeron, Pentium, AMD, etc.) and different speeds (600Mhz, 700Mhz, 1.79 (1790 Mhz) and so on). The CPU is one of the main reasons...