Basic Parts of a Computer
Computer case
Is the metal and plastic box that contains the main components of the computer, including the motherboard, central processing unit (CPU), and power supply.
![](https://media.gcflearnfree.org/content/55e073137dd48174331f5166_01_17_2014/desktop_computer_case.jpg)
Monitor
The monitor works with a video card, located inside the computer case, to display images and text on the screen.
![](https://media.gcflearnfree.org/content/55e073137dd48174331f5166_01_17_2014/desktop_computer_monitor.jpg)
Keyboard
is one of the main ways to communicate with a computer. There are many different types of keyboards, but most are very similar and allow you to accomplish the same basic tasks.
![](https://media.gcflearnfree.org/content/570ea870e0a910146005e5cd_04_13_2016/2016_keyboard_full_bg.jpg)
Touchpad
Is a touch-sensitive pad that lets you control the pointer by making a drawing motion with your finger. Touchpads are common on laptop computers.
![](https://media.gcflearnfree.org/content/55e073137dd48174331f5166_01_17_2014/laptop_touchpad.jpg)
Mouse
Is another important tool for communicating with computers. Commonly known as a pointing device, it lets you point to objects on the screen, click on them, and move them.
![](https://media.gcflearnfree.org/content/55e073137dd48174331f5166_01_17_2014/periph_mouse.jpg)
Mouse alternatives
Many people find them easier to use, and they also require less desk space than a traditional mouse.
![](https://media.gcflearnfree.org/content/55e073137dd48174331f5166_01_17_2014/2016_parts_rollerball.jpg)
Trackball
A trackball has a ball that can rotate freely. Instead of moving the device like a mouse, you can roll the ball with your thumb to move the pointer.