Personal computers commonly comprise a sheet metal case containing a motherboard, one or more drive housings holding various drives, a backplane to which a motherboard and its add-on cards are attached, a power supply and various other components. Typical cases for personal computers generally are either of the horizontal desk top variety for being placed in a horizontal orientation on a support surface such as a desk top, or of a vertical tower type design that are for being placed in a vertical orientation on a support surface. When the case is placed horizontally, a monitor may be placed on the upper side of the main case. But this type of configuration makes assembly of components and parts of the computer main frame, expansion, and maintenance very inconvenient. Before every operation, the monitor on the case have to be removed, the support frame has to be removed by firstly loosening the screws. After assembly or maintenance, the support frame and monitor have to be mounted in place again, which is not only inconvenient but also increases manufacturing costs. Personal computers are in wide use today and one popular style is the desktop computer that is mounted in a vertical housing that occupies a relatively small space on a desktop. In either configuration, the rear wall of the case has one or more apertures to serve interface (I/O) ports which permit connection of peripherals, such as a keyboard, to the mother board. Additionally, the mother board has a plurality of sixteen or thirty-two pin sockets which receive removable accessory cards such as sound cards, graphics cards and cards which are dedicated to specific software programs or to peripherals such as printers, scanners, and the like. The rear edges of the accessory cards often have one or more sockets for connection of plugs attached to cables which extend to a peripheral such as a LCD monitor, modem, scanner, digitizing tablet, printer, etc.

A regular computer case generally comprises a side opening through which computer parts are installed in the case, and a side cover panel adapted to close the side opening after installation of the related computer parts. The panels in the computer case are connected to each other with screws or similar fasteners. Some computer enclosures adopt hooks to reduce or even eliminate the need for screws. Hooks formed on panels of the enclosure engage in recesses defined in other panels of the enclosure. Engaging force between the hooks and the other panels at the recesses is generally large enough to ensure stability of the enclosure. A support bracket in a computer enclosure often defines a number of cavities for accommodating data storage devices therein. A front panel of the computer enclosure accordingly defines a number of openings for insertion of the data storage devices. A number of metal shields are attached in the openings of the front panel, to prevent electromagnetic radiation generated by the computer from coming out of the computer. A common computer comprises a plurality of expansion slots in a mother board thereof, for receiving expansion cards to expand the functions thereof. Accordingly, such computer enclosure requires a plurality of slots for providing access to the expansion cards. Peripheral component connectors on the PCB's extend through these PCI slots so that compatible external devices can be plugged into the PCB via the peripheral component connectors. Many computers employ enclosures or cases which include peripheral/drive bays for receiving interchangeable peripheral drives and drives such as floppy disk drives, optical disk drives, or tape drives. The universal serial bus (USB) connector is getting more and more common for connection ports in personal computers because the connection between personal computer and external peripheral equipments can be simplified. Typically, these bays can be accessed through an opening in the front wall, or bezel, of the computer case. Additionally, an EMI shield may be provided within the bay beneath the cover. The EMI shield is grounded to the metal chassis of the computer case to prevent EMI emissions through the peripheral/drive bay opening.

Personal computer enclosures are nowadays generally being made as light, thin, short and compact as possible. A computer case is often finished with a coating to improve the appearance of the enclosure. A surface of the computer enclosure fully exposed to external space is fully coated. Once the surface of the computer enclosure is partially exposed to external space, the unexposed portion of the computer enclosure is veiled from coating. As computer system frequencies and power increase, the electromagnetic energy or noise, also known as electromagnetic interference (EMI), radiating from the computer system housing increases proportionally. This electromagnetic interference can interfere with the operation of other pieces of electronic equipment associated with the computer system or in close proximity. For computer systems, EMI requirements are generally complied with by enclosing the computer system in an enclosure made of metal or other conductive material. A number of present day electronic components utilized in computer systems generate large amounts of heat. Heat produced within the computer enclosure increases due to increase in operational speed as the computer industry develops, which may increase an internal temperature of the computer enclosure and reduce stability of the computer system. Accordingly, computers require air flow paths through the enclosure and chassis for the purpose of cooling components disposed inside the chassis. Computer enclosure cooling systems mostly comprise fans and blowers which create a partial vacuum in the computer enclosure, or alternatively which provide specific ports for air flow into the computer enclosure from the room ambient, in order to increase the transfer of heat out of the computer enclosure into the room ambient. The front panel of a computer enclosure is usually formed with openings for ventilation holes for heat removal.