The parts of a computer that you use are as follows:
The keyboard is used for typing information (input).
The mouse is a small, hand-held device, which you move over the surface of your desk, making a pointer move on the screen. This is used for controlling of the computer for drawing on the screen.
The monitor (also called the visual display unit) is for displaying information. It works like a television set and can display both text and pictures.
The processor is where all the information is processed.
The disk drive is used for storage and retrieval of information. The disk can be removed from the drive and kept until they are needed again.
The printer is used to make permanent copies of the information from the computer.