Binary vs. base 10. Base 10 is great for humans, but -- for reasons dealing with the on and off energy states -- computers use a base 2 number system. With base 2, or binary, every digit represents a ...

The first versions of ASCII used 7-bit codes, which meant they could attach a character to every binary number between 0000000 and 1111111, which is 0 to 128 in decimal.

Binary code is used widely in computer programming, so it is important to learn what it means and how to use it. Denary. The decimal number system, which we use everyday, is called denary.