# Computing - Number Systems

> Source: https://ollybritton.com/notes/a-level/computing/topics/number-systems/ · Updated: 2020-10-22 · Tags: computing

##### What does $\mathbb{Z}$ represent??
The set of integers.

##### What does $\mathbb{Q}$ represent??
The set of rational numbers.

##### What does $\mathbb{N}$ represent??
The natural numbers.

##### What does $\mathbb{R}$ represent??
The real numbers.

##### What is an ordinal number??
A number describing a position of something.

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