Numbers and units of measure
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When using numbers in running text, follow these guidelines:
* Spell out numbers from one to nine. However, use numerals for units
of measure.
* Use Arabic numerals for numbers above ten.
* If a numeral starts a sentence, spell it out. For example: *Five thousand
environments have been deployed during the last six months.*
* In one sentence, use either a spelledout number or a numeral, not both.
* Use a comma if a numeral includes more than 4 digits. For example: *50,000*.
In mathematical expressions:
* Use the *x* symbol for multiplication.
* Add a space between numbers and operators. For example: *256 x 2 = 512*.
When using units of measure in running text, follow these guidelines:
* Use the corresponding unit symbol if a unit of measure comes immediately
after a numeral.
* **Kb** for kilobit
* **KB** for kilobyte
* **kbps** for kilobits per second
* **GB** for gigabyte
* **Gbit** for gigabit
* **MB** for megabyte
* Do not pluralize an abbreviated unit of measure.
* Add a space between a numeral and a unit of measure.

This documentation, is a derivative of `Writing style `_ by OpenStack, used under CC BY.