The document describes the main parts of a computer including the CPU, mouse, keyboard, monitor, printer, scanner, CD, and hard disk. It explains that the CPU is the "brains" of the computer and processes information, a mouse has a ball and buttons to click and choose things on screen, a keyboard is used for typing, a monitor displays the screen, a printer outputs to paper, a scanner copies pictures, a CD holds information, and a hard disk saves work and memory. It concludes with a quiz asking about the meaning of CPU, parts of a mouse, what a CD does, and parts covered.