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Computer cases are protective housings designed to secure and organize the various components of a computer system, including the motherboard, central processing unit (CPU), memory modules, storage devices, and power supply. They serve as the physical foundation for a computer, providing structural support and enabling easy installation, maintenance, and upgrades of hardware components. Computer cases come in various sizes, known as form factors, such as ATX, Micro-ATX, and Mini-ITX, which determine the compatibility with different motherboard types and the maximum size of internal components. They are typically made of materials like steel, aluminum, or plastic and feature ventilation systems to ensure adequate airflow and cooling for optimal system performance. Some computer cases also offer customizable features such as lighting effects, tempered glass side panels, and cable management solutions, catering to the diverse needs and preferences of users. Overall, computer cases are an essential component in building a reliable and aesthetically pleasing computer system.