This first lesson gives you a short introduction into binary and hex numbers. You will need to understand this before you move on. If you already know this, you can skip this lesson and move on to lesson 2 immediately.
Most processors only understand binary information.
This is data composed of only ones and zeros. Where our decimal system has a base of 10, the binary system has a base of 2. A '1' or a '0' is called a bit . If you combine 4 bits, e.g. '1100' or '0101', you get a nibble . 8 bits or 2 nibbles makes a byte .