Without the appropriate hardware, a computer would be useless.
Computer hardware can be defined as all components of a computer that you can physically touch, feel, hold, or install. All computers contain hardware -- and need hardware -- in order to operate. If your computer hardware begins to fail, your computer will crash. However, hardware doesn't act alone and needs both an operating system and software to reach its true potential.
Inner Workings
The motherboard -- located within your computer's tower -- is a crucial piece of computer hardware. The motherboard contains the circuits and components that allow your computer to run. Think of it as the engine in relation to a car. Located within the motherboard is the CPU (central processing unit) chip. The hard disk drive located within your computer stores your data -- such as files, programs, games, etc -- on a permanent basis. The RAM (random access memory) is used to retrieve this data from the hard disk drive with the help of the CPU, allowing your computer to access the files and data you need.
Control
Your computer would be useless if you couldn't see what you were doing on it, or lacked the ability to control what it did. The computer monitor allows you to view the computer functions you request. CRT (cathode ray tubes) and LCD (liquid crystal display) are the two main types of monitors. CRT monitors are typically heavier and larger than LCD monitors. The keyboard allows you to enter commands and contains function keys, navigation keys and numeric keys. The mouse allows you to navigate around your display screen. Once the arrow of the mouse is over a desired file on the screen, you must double click the left mouse button to open it. The monitor, keyboard, and mouse act together, allowing you to utilize your computer as you need.
Extras
Computers can have hardware added to them, allowing you to customize your unit to your own specifications and needs. For example, you can add a printer to your computer if you need to print documents or pages. You should always print or backup a copy of your work in case your computer crashes. You can also add external drives -- such as an external DVD or CD drive. Some computers already have these built-in. If you wish to watch movies or TV shows on your computer, you can purchase speakers, allowing you to hear the action.
The Operating System
Computer hardware itself would be useless without an operating system, often referred to as an "OS." The operating system acts as a communicator between the hardware and the software -- or programs -- located within your computer. Without an operating system, these programs would not operate. Windows, Linux, and Unix are just three types of operating systems. These systems allow your computer to run multiple programs at the same time.
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