A PC tower is the case that typically houses several components of a traditional desktop computer. Also known as the computer chassis, the tower comes in different sizes to accommodate the forms of various computer parts, including the motherboard, cooling system, sound and video cards, and power supply.
Depending on the design, a computer tower may contain a number of expansion bays for memory drives, a rear panel for connectors and interfaces, and a section for buttons and LED status indicators. Computer towers also have at least one removable panel that allows access when making repairs to the internal components or adding more peripherals to the motherboard. The size of the tower limits what hardware expansions can be fitted inside.