Input-output devices

In addition to the letters of the alphabet this device also includes keys to control the movement of the cursor on the screen.

• keyboard

• touchscreen

• touchpad

• scanner

By moving this device around a flat surface the user can direct the movement of the cursor on the screen. It can give instructions by selecting icons on the screen and clicking on a button.

• keyboard

• touchscreen

• mouse

• scanner

It enables communication between computers over external connections by converting digital data into other signals and vice versa.

• keyboard

• modem router

• mouse

• monitor

It is a device that uses light sensors to digitise photographs and other illustrations.

• keyboard

• scanner

• mouse

• touchscreen

This usually takes the form of a flat screen panel with a display based on liquid crystal or LED technology.

• webcam

• touchpad

• monitor

• touchscreen

It produces output on paper. The most common types are inkjet and laser.

• monitor

• touchpad

• printer

• mouse

It transforms electrical signals into sound waves which can be heard by the user.

• speakers

• touchpad

• printer

• mouse

By using a finger or special stylus, a user can select and interact directly with what is displayed on the screen.

• keyboard

• touchpad

• printer

• touchscreen

By moving a finger around a small area of sensitive plastic, the user can control the movement of the cursor on the screen, select icons and give instructions.

• keyboard

• touchpad

• printer

• touchscreen

This converts sound into electronic signals which can be read by the computer and stored in its memory.

• modem router

• printer

• scanner

• webcam