There are a number of very common needs for a computer, including the need to store and view .

Computers use electrical signals that are on or off, so they have to see everything as a series of numbers. This data is represented as a sequence of 1s and 0s (on and off). **All data that we want a computer to process needs to be converted into this binary format**.

**Binary is a number system that only uses two digits: 1 and 0.** All information that is processed by a computer is in the form of a sequence of 1s and 0s. Therefore, all data that we want a computer to process needs to be converted into binary.

The binary system is known as a ‘base 2’ system. This is because:

- there are only two digits to select from (1 and 0)
- when using the binary system, data is converted using the power of two.

We know how difficult it can be. Even getting here might have required some help from someone else! How can you learn to use a mouse if you don't know how to use one to get here in the first place? Ask whoever is with you to start you on your journey. Just ask them to click on the "Part One" link for you, or the "Learn More" button.

GET STARTED