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Computer cases are the protective housings designed to encase and safeguard the internal components of a computer system, such as the motherboard, processor, memory modules, storage drives, and power supply. They serve multiple purposes, including thermal management, cable organization, and aesthetics. Computer cases come in various sizes and forms, tailored for different types of computers and applications, from compact and portable solutions like laptops and all-in-ones to more spacious and modular designs intended for high-performance desktop systems and artificial intelligence workstations. Materials used in computer cases range from steel, aluminum, and tempered glass to acrylic and other plastics, providing durability, style, and ease of access for installation or upgrades. Moreover, computer cases cater to a wide array of user preferences, with features such as tool-less drive bays, removable filters, fan controllers, and RGB lighting enhancing functionality and customization options. Cases can be classified into several categories based on size, including mini-ITX, micro-ATX, ATX, and E-ATX, each with its own set of dimensions and compatibility requirements for motherboards and expansion cards. The choice of a computer case ultimately depends on the user's needs, budget, and desired balance between form and function. In summary, computer cases are essential components in any computing setup, providing both protection and functionality to the delicate internal hardware of a system while allowing users to express their personal style and preferences through thoughtfully designed features and aesthetics.