Desktop PC

A desktop computer is a personal computer designed for regular use at a single location on or near a desk or table due to its size and power requirements. The most common configuration has a case that houses the power supply, motherboard (a printed circuit board with a microprocessor as the central processing unit (CPU), memory, bus, and other electronic components), disk storage (usually one or more hard disk drives, solid state drives, optical disc drives, and in early models a floppy disk drive); a keyboard and mouse for input; and a computer monitor, speakers, and, often, a printer for output. The case may be oriented horizontally or vertically and placed either underneath, beside, or on top of a desk.

Desktop computers are designed to work at the table. Usually, they are bigger and more powerful than other types of personal computers. Desktop computers are made up of individual components. The main component is called the system unit - usually, it is a rectangular case that is on or under the table. Other components, such as the monitor, mouse and keyboard, are connected to the system unit.

As a rule, all additional external devices are connected to the PC system unit using special connectors. Their main part is located on its rear wall. Some, the most popular ones, are brought to the front, for example, USB connectors and audio outputs. The system unit itself consists of internal devices, called components.