Abstract: A computer which includes modular structures incorporated therein provides enhanced serviceability. In a preferred embodiment, the computer has a chassis, a lid, a front bezel, an option card module, a system board module, a drive module, and a power supply module. The lid secures the option card module within the chassis. The option card module is removable from the chassis without disconnecting fasteners, option boards, or external cables therefrom. The system board module is received in the chassis and is secured therein by the option card module. The drive module has features which enable storage media devices to be conveniently installed therein and removed therefrom.