We use computers on a daily basis, at home, at work or while traveling to access the Internet, play computer games, watch movies and so much more. Yet, most of the times if not ever, we never give a second thought to just what our computer is made off. You know it contains hardware components but what exactly they are, how are they called or what is their function within our personal computer are usually questions without answers or with vague ones. I'm going to be talking bellow above about the hardware components for a personal computer that are essential to it:

1. The PC Monitor is the device on which you visualize movies, games, and programs like word editors and Internet browsers. Older models featured a Cathode Ray Tube (hence the name CRT) with controls housed in a plastic case. Their diagonal ranged from 13 to 21 inches. Today LCD monitors have flooded the market, providing wide screen image display and smaller weight compared to their older counterparts, the CRT computer monitors. Most monitors feature controls used to adjust contrast and brightness while others have options to move the image left, right, up or down. CRT monitors also have a degauss option which can be used when the image isn't displayed correctly.

When it comes to picture quality we basically speak of resolution and refresh rate. Resolution is measured in pixels and is connected with how well our monitor displays images. Refresh rate refers to how often your image quality gets refresh. The recommended quality is usually 60 Hz, but since there are so many types of monitors it is best to consult the monitor's manual for the right value. Bear in mind that using a different value other the one recommended in your manual can damage your monitor.

2. The motherboard is the board that contains the CPU, the memory, BIOS, CMOS, Video devices, sound devices, storage devices, chipsets, etc. together with the connectors and logic circuits that tie all parts of your PC together. Together with the wiring in your computer it resembles to the network of veins in your body.

3. The CPU (Central Processing Unit) is considered by some to be a computer inside another computer. This isn't to far from the truth since the processor manages the huge number of instructions given to him by the other computer hardware components similar to how the computer manages the instructions you give it by using external input devices like the keyboard and mouse.

4. The "hard drive" is a storage device with one or more metal disks (called platters), arranged on a spindle, one above the other; with a read/write head (often on an arm that can be moved to a specific point on the recording surfaces. This read/write machine can probably be called the first true 'robot'. Hard drive units are sealed hermetically to keep out dust. Even the smallest particle of dust can damage the platters so it's recommended you don't open them. The most recent hard drives can have up to 1.5 Terra Bytes.

5. The video card is an essential part of any computer. It provides your computer to play video files, computer games and other things. Without a video card to convert the binary code from the CPU and transmit in a graphic way to your monitor you wouldn't be able to watch anything. In some cases the video card can be integrated on the motherboard.

6. The sound card is very much like the video card, with the small difference that instead of converting CPU binary code and send it to your monitor it uses a different type of conversion allowing you to hear sounds in your computer speakers.

7. Over the years the CD-ROM drive and the DVD-ROM have proven to be essential to a personal computer. Information transfer had at its heart this hardware component. In recent years, with the development of the Internet, flash drives and portable hard drives, CD and DVD-ROMs have started to register a slow decline from the information transfer market. They will still be around for some years to come since they are the backbone of the music and movies commercialization.

8. As a last entry to the list of computer hardware components I'll add a duo of hardware parts, namely the keyboard and the mouse without which you couldn't control you computer. That is until technologies similar to the touch screen will appear on the market, but this will undoubtedly take some time.