A Keyboard is used for typing up letters, numbers and punctuation.
The Keyboard is important because it's the most effective way to type letters and characters.
Modern keyboards matching US conventions typically have 104 keys and usually are made up of plastic and various metals.
Speakers are on of the most common output devices in a laptop.
Some speakers are specifically designed to work with computers but other may need to be hooked up to a sound system.
A monitor is extra screen space for graphical applications
The monitor displays the user's interface and open programs allowing the user to interact with the computer