A keyboard is a primary input device used with a computer. The standard layout of a keyboard is typically known as a “QWERTY keyboard” because the first six keys on the top row of letters spell QWERTY.

A monitor or computer screen/display. This displays the computer’s user interface and open programs which allows a user to interact with the computer.

The mouse along with the keyboard is one of the primary input devices. A mouse is typically used to open files/programs and switch between them once open. A mouse works by relaying the movements of a ball on its underside to the computer screen enabling you to control a small curser. An infrared mouse has no ball but works the same way only using a small laser.