When choosing a case, look for a case that is well ventilated to keep the components inside cool. Also make sure the case has enough room to accommodate features you may want to add in the future.

A notebook computer is a small, lightweight computer that is powered by a rechargeable battery, so it is easily transportable. A notebook has a built-in keyboard: pointing device, speakers and screen.

An all-in-one case contains all the major computer components, such as a monitor and hard drive, in a single unit.

A parallel port, which is also known as a printer port or LPT port, can connect an older printer or an older scanner. On newer computers, parallel ports have been replaced with USB (Universal Serial Bus) and FireWire ports. Some newer computers do not have any parallel ports. Parallel ports are also referred to as legacy ports, which means these ports are outdated but are still in use on some computers.