PC Girl Computer Case

Case modification (commonly referred to as case modding) is the modification of a computer chassis (often just referred to as the case), or a video game console chassis. Modifying a computer case in any non-standard way is considered a case mod. Many people, particularly hardware enthusiasts, use case mods to illustrate a computer's power (by showing off the internal hardware), and also for aesthetic purposes. Cases may also be modified to improve a computer's performance.
When personal computers first became available to the public, the majority were produced in simple, beige-colored cases. This design is sometimes referred to as a beige box. Although this served the purpose of containing the components of the personal computer, many users saw their computers as "tacky" or "dull", and some began modifying their existing chassis, or building their own from scratch.
A new market for third-party computer cases and accessories began to develop, and today cases are available in a wide variety of colors and styles.