Computer lesson(charm and gleny)

This document discusses the major input and output devices of a computer. It defines input devices as tools that help enter data and instructions into a computer, like the mouse, keyboard, joystick, and scanner. The mouse controls screen cursor movement, keyboard allows text entry, joystick navigates games, and scanner imports text and images. Output devices let users see the computer's work, such as the monitor to display images, printer to print text and graphics, speaker to produce sound, and headphones for private listening. The document instructs identifying these devices and their functions.