# P4

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> Markdown URL: https://mediated.wiki/source/P4.md
> Source: https://en.wikipedia.org/wiki/P4
> Source revision: 1336172919
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

'''P4''' may refer to:
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==Computing==
* [Intel Pentium 4](/source/Intel_Pentium_4), a processor series shipped from 2000 to 2008 
** The P4 power connector, introduced in the [ATX12V 1.0 standard](/source/ATX_Power_Connector) to power these and later CPUs
* The i486DX (P4) model of the [Intel 80486](/source/Intel_80486) microprocessor, introduced in 1989
* [P4 (programming language)](/source/P4_(programming_language)), for controlling network data forwarding
* P4, the [Perforce](/source/Perforce) software command line client

==Media==
* [P4 Radio Hele Norge](/source/P4_Radio_Hele_Norge) (PFI), a Norwegian radio company
** [Kanal 24](/source/Radio_Norge) (Kanal 4), which acquired the Norwegian P4 channel from PFI
* [Sveriges Radio P4](/source/Sveriges_Radio_P4), a Swedish radio channel
* ''[Persona 4](/source/Persona_4)'', a 2008 video game
* ''[Periphery IV: Hail Stan](/source/Periphery_IV%3A_Hail_Stan)'', a 2019 album by American progressive metal band Periphery
* ''[PartyNextDoor 4](/source/PartyNextDoor_4)'', a 2024 album by Canadian singer PartyNextDoor
* ''[Psychonaut 4](/source/Psychonaut_4)'', a Georgian black metal band

==Military==
* [Skaraborg Regiment (armoured)](/source/Skaraborg_Regiment_(armoured)), a Swedish army unit, designated P 4
* [Peugeot P4](/source/Peugeot_P4), a French military vehicle

==Science==
* [P4 laboratory](/source/P4_laboratory), a biosafety level 4 facility
* [Tetraphosphorus](/source/Tetraphosphorus) (P<sub>4</sub>), an allotrope of phosphorus
* Group p4, the plane symmetry group [wallpaper group ''p''4](/source/Wallpaper_group)
* [Progesterone](/source/Progesterone) (Pregn-4-ene-3,20-dione), a steroid hormone
* [Kerberos](/source/Kerberos_(moon)), the fourth moon of Pluto
* [Perfect fourth](/source/Perfect_fourth), a musical interval
* [Enterobacteria phage P4](/source/Enterobacteria_phage_P4)
* P4, an EEG electrode site according to the [10-20 system](/source/10-20_system_(EEG))
* P4 cell, a [stage in the ''Caenorhabditis elegans'' embryonic development](/source/Caenorhabditis_elegans)
* [P4-metric](/source/P4-metric), in statistics, a performance metric
* [P4](/source/List_of_space_groups), three-dimensional space group number 75
* [P{{overline|4}}](/source/List_of_space_groups), three-dimensional space group number 81

==Roads==
* [P4 road (Latvia)](/source/P4_road_(Latvia))
* [P04 road (Ukraine)](/source/P04_road_(Ukraine))

==Other uses==
* [Papyrus 4](/source/Papyrus_4), a New Testament manuscript
* [Trans-Pacific Strategic Economic Partnership](/source/Trans-Pacific_Strategic_Economic_Partnership), or P4, a free trade agreement between Brunei, Chile, New Zealand, and Singapore
* [Prussian P 4](/source/Prussian_P_4), a German steam locomotive
* [Protofour](/source/Protofour), or P4, a set of standards for model railways

==See also==
* [4P (disambiguation)](/source/4P_(disambiguation))
* [Phosphate](/source/Phosphate), molecular formula {{chem2|PO4(3-)}}<!--PO4 redirects to [Phosphate](/source/Phosphate); easily mistaken for P04, which redirects to here-->
* [Play (telecommunications)](/source/Play_(telecommunications)) P4, a Polish cellular telecommunications provider

{{Letter-number combination disambiguation}}

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Adapted from the Wikipedia article [P4](https://en.wikipedia.org/wiki/P4) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/P4?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.