The invention of the computer has had a huge impact on our day to day lives, and they are now present everywhere - at home, at work and in schools. It is so easy to recognise that personal computers, laptops and mobile devices are computers, but computers are also hidden in many other devices. Computers are ofund in many of the devices we use on a daily bases. Becasue they are relied on so heavily, knowing what they are and how to ise then is valuable. Three main types of devices are, input devices, Output devices and storage devices.