A computer case, also known as a chassis, is the enclosure that houses the internal components of a computer, such as the motherboard, power supply, and storage drives. It protects these parts from dust, damage, and electromagnetic interference while providing a structure for organization and airflow. Cases come in various sizes, including ATX, Micro-ATX, and Mini-ITX, to accommodate different hardware configurations. In addition to protection, computer cases often feature design elements like cooling fans, cable management systems, and front panel ports for easy access. Some cases are designed for aesthetics, allowing users to showcase their builds with transparent panels or RGB lighting. Overall, a good computer case is essential for both functionality and style.