A personal computer is made up of computer hardware, multiple physical components onto which can be loaded into a multitude of software that perform the functions of the computer. Though a PC comes in many different form factors, a typical personal computer consists of a case or chassis in a tower.
The motherboard is the "body" of the computer, through which all other components interface. The central processing unit (CPU) performs most of the calculations which enable a computer to function, and is sometimes referred to as the "brain" of the computer. It is usually cooled by a heat sink and fan. Enables the computer to output sound to audio devices, as well as accept input from a microphone.
Most modern computers have sound cards built-in to the motherboard, though it is common for a user to install a separate sound card as an upgrade. Most sound cards, either built-in or added, have surround sound capabilities.
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