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Computer cases are protective housings designed to secure and organize computer components, such as the motherboard, processor, memory, storage devices, and power supply. These enclosures serve multiple purposes, including shielding internal hardware from external elements, promoting airflow for cooling, and providing a visually appealing aesthetic. They come in various sizes, known as form factors, to accommodate different types of motherboards and components, such as ATX, Micro-ATX, and Mini-ITX. Computer cases may also have features like built-in cable management systems, removable drive bays, and tool-less side panels for easy access during upgrades or maintenance. Additionally, computer cases can be customized with windowed sides, LED lighting, and other accessories to reflect the user's personal style. Overall, computer cases are an essential component of a well-functioning and visually pleasing computer system.