hear it  Input/Output Devices 

Input Devices

We need a way to enter (input) our data to the computer. Devices that can enter data to computers are called input devices . Examples of input devices (see Fig. m010111.1) include keyboards, Mouse, touch pads, light pens, joy sticks ...etc.

Fig. m010111.1 Examples of Input Devices

Output Devices

After we calculate the average height, we will need to get the result and present it to the user in a convenient form. An output device is used to output the data. Examples of output devices are monitors, printers ...etc.

Peripheral devices include input and output devices.