What is the computer system unit made up of?

The computer system unit, often referred to as the computer case or chassis, houses essential components such as the motherboard, central processing unit (CPU), random access memory (RAM), power supply, and storage devices (like hard drives or solid-state drives). It also contains expansion slots for additional hardware, such as graphics cards and network cards. The system unit serves both to protect these components and to facilitate cooling and airflow during operation.