Central unit and personal computers
The modern general purpose personal computers have always UNIA Central. And because, thanks to the advent of microelectronics, today the level of integration of logical and functional components of the computer is very high (so hardly the processing unit that oversees all the functionality of the computer is a hardware lock him). And because, even when all the main hardware components of the personal computer constituting a single block, the personal computer is always equipped with several ports for connecting external devices (such as the printing unit, the disk drive, the modem, etc.) optional (ie not included in the sales package of the personal computer).
Central unit and desktop computer
In desktop computers the central unit includes most of the major components of the logical-functional computer and the power supply. Excluded external devices not essential to the operation of the computer such as the printer or monitor audio. If the computer is not a computer all-in-one, the central unit does not include either the main user interface output, the display, which is inserted in a separate block: the video monitor. If it is an all-in-one computer, the display is also included in the central unit. The main user interface input, the keyboard, it can either be a separate block, is to be included in the central unit (such as in the home computer). The mouse instead always constitutes a separate block.
CPU and notebook computer
The central unit (left) and the hard disk (right) of a notebook computer
In the notebook computer the central unit includes all major computer hardware. In such computer is referred to as central unit only as a consequence of the fact that they are always equipped with several ports for connecting external devices (usually optional). The central unit is also equipped with autonomous power supply thanks to rechargeable electric batteries integrated in the central unit. In the box of the sale of the notebook computer, usually also includes a power supply. The power supply is a hardware block separate from the main unit and allows, if connected to the mains, supplying power to the computer when the battery power is low, as well as to recharge these batteries.
Central unit and tablet computer
Even in the tablet computer the central unit includes all major computer hardware.
