# Category 0

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Category_0
> Markdown URL: https://mediated.wiki/source/Category_0.md
> Source: https://en.wikipedia.org/wiki/Category_0
> Source revision: 1064895846
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**Category 0** can refer to:

- *Empty category* 0, the [category](/source/Category_(mathematics)) of no objects and no morphisms, is the [initial object](/source/Initial_and_terminal_objects) of the [category of small categories](/source/Category_of_small_categories) is the *empty category*
- Category [0], a [simplex category](/source/Simplex_category)
- [Category 0 triage (Japan)](/source/Triage#Japan) - for victims who are dead, or whose injuries make survival unlikely.
- [Category 0 of Grade 0 peripheral artery disease](/source/Peripheral_artery_disease#Classification) - asymptomatic
- Category 0 [psychics](/source/Psychic#Science_fiction) in *[Psycho Busters](/source/Psycho_Busters)* - *chronodivers*, who have the ability to stop and reverse time and change the past
- [Category 0 cultural heritage assets (Belarus)](/source/Cultural_heritage_of_Belarus) - inscribed or proposed for inscription on the World Heritage List
- [Category "0" vessel](/source/Seamester#Vessels) - allowing unrestricted operation in the world's oceans
- Category 0 in ["End of the Road" (*Torchwood*)](/source/End_of_the_Road_(Torchwood))
- [Category 0 of the ILO International Classification of Radiographs of Pneumoconioses](/source/ILO_Classification#Methodology) - the absence of small opacity

## See also

- [Category O](/source/Category_O)
- [Category 1 (disambiguation)](/source/Category_1_(disambiguation))

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Adapted from the Wikipedia article [Category 0](https://en.wikipedia.org/wiki/Category_0) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Category_0?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.