The computer case is a very important part of the computer. It protects all of the electronic components
inside and provides adequate ventilation to prevent overheating. The case also should be capable of
allowing you to expand your hardware if the need arises. Some cases only have 5 or 6 expansion bays.
This may not be enough if you plan to add several drives. There also should be plenty of expansion slots
on the back for adding AGP, ISA, PCI, PCIe, or other expansion cards. Cases are designed for different
types of motherboards. All motherboards won't work inside of all cases. There are several different sizes
of cases. The larger cases have more expansion bays than the smaller cases have. The smallest case is the
"desktop" type that lies flat. The next size up is the "mini tower," then the "mid tower," then the "full
tower," and finally the "server," which is the largest. The server case is primarily used for server
computers in businesses. The ATX mid tower case is the most widely sold case for personal use.