Secondary Storage

Secondary Storage is a cloud storage or a portable storage like a usb stick or a cloud storage website. We need secondary storage to use as a backup for our computer or to use for portability.

The need for Input, Output & Specialist Needs Devices

Input

An input into a computer is something as simple as your movement of the mouse or pressing some keys on a keyboard. Input is everywhere around us, it varies from anywhere between sensors in a washing machine to changing the temperature dial. Input is basically you doing something. 

Output 

Output is basically the system's response to your input. This can be you moving the mouse and the cursor moving on the monitor.

Specialist Needs

It is for example a brailic keyboard, or basically something that is specifically made for a certain purpose. Its need is to help people that cannot control things otherwise. Like Stephen Hawking's brain controlled wheelchair.

And-Not & Or-Not Gates

These are 'And Not' and 'Or Not' gates. With the or gates either switch 1 or 2 have to be live in order for the lightbulb to be on however once it passes through the not gate the outcome is the opposite to what was the input. With the and gates both switches have to be on in order for the lightbulb to be on however once it passes through the not gate the output is the opposite to what was the input.