The main parts of a desktop computer are the computer case, monitor, keyboard, mouse, and power cord. Each part is important when using a computer.

Computer Case


The computer case is a box made of metal and plastic. It holds the main components of the computer, like the motherboard, CPU, and power supply. The front of the case usually has an On/Off button and sometimes optical drives.

Computer cases come in different shapes and sizes. A desktop case lies flat on a desk, and the monitor often sits on top of it. A tower case is tall and usually stands next to the monitor or on the floor. All-in-one computers have the computer parts built into the monitor, so you don’t need a separate case.

Monitor


The monitor works with a video card inside the computer case. It shows images and text on the screen. Most monitors have buttons to adjust display settings, and some have built-in speakers.

Newer monitors use LCD (liquid crystal display) or LED (light-emitting diode) technology. These monitors are thin and are often called flat-panel displays. Older monitors use CRT (cathode ray tube) technology. CRT monitors are heavy, big, and take up more space.

Keyboard


The keyboard is a main way to interact with the computer. There are many types of keyboards, but they all let you do basic tasks.

Mouse



The mouse is another important tool for interacting with a computer. It is called a pointing device because it lets you point, click, and move objects on the screen. There are two main types of mice:
  • Optical mouse: Uses an electronic eye to detect movement. It is easy to clean.
  • Mechanical mouse: Uses a rolling ball to detect movement. It needs regular cleaning to work well.

Mouse Alternatives

There are other devices you can use instead of a mouse. These take up less space and can be easier for some people.

  • Trackball: A device with a ball that rolls. You move the pointer by rolling the ball with your thumb or fingers.
  • Touchpad: Also called a trackpad. It is a touch-sensitive pad. You move your finger on it to control the pointer. Touchpads are common on laptops.


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