system unit

<hardware> The main body of a computer, consisting of a plastic or metal enclosure, the motherboard, and (typically) internal disk drives, a power supply, cooling fans, and whatever circuit boards plugged into the mother board, such as a video card.

The system unit is occasionally referred to as the CPU, though this really means central processing unit.

Nearby terms:
systems programmer « systems programming « system testing « system unit » System V » System V Interface Definition » Système International d'Units