The width or quantity of channels in the computer’s main bus is equivalent to the data word size (measured in bits) of the computer.

Integers or whole numbers encoded as patterns of binary digits are frequently represented by data-words.

The formula for the largest number that a binary encoded integer can represent is 2data-word width in bits – 1.

For example

connecting components) and therefore

which requires a ninth bit or what is called a *binary overflow* will occur

we can count up to (28 – 1). 255. Counting further than 255 is not possible with eight bits

as the operation 255 + 1 carries over a one

returning 0 as the answer