Editing C4

{{wiktionary|C4|c4}}
'''C4''', '''C04''', '''C.IV''', '''C-4''', or '''C-04''' often refers to [[C-4 (explosive)|the explosive]]. It may refer to:

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==Places==
* Caldwell 4 or NGC 7023 or [[Iris Nebula]], a reflection nebula in the constellation Cepheus
* [[Circumferential Road 4]] or C-4, an arterial road of Manila, Philippines
* [[Ken-Ō Expressway]], a road in Japan (includes some sections of Shin-Shōnan Bypass)
*[[Omote-sandō Station]], a Tokyo Metro subway station (station number: C-04)
*Wadi C-4, designation for the [[Tomb of Thutmose II]]

==People==
* [[C4 (rapper)]], a rap music producer from Birmingham, England
* [[Clarence Mitchell IV]], American radio host and former politician
* Chris Turner, sometimes credited as Chris Heiner, a.k.a. "C4", Australian musician, part of [[Modern Day Poets]]

== Computing ==
*[[C4 (conference)]], a Macintosh software developers conference
* [[C4 Engine]], a next-generation 3D game engine
* [[C4 model]], a graphical notation technique for diagramming software architecture
* [[Cx4 chip]], an add-on microprocessor chip employed by certain Super NES game cartridges (often incorrectly referred to as the ''C4 chip'')
* Controlled collapse chip connection or [[flip chip]], a method for interconnecting semiconductor devices
* [[VIA C4]], a planned design of central processing unit for a personal computer

== Arts, entertainment, and media==
===Music===
* [[C4 (American band)]], a neo-classical metal band set up by Michael Angelo Batio
* [[C4 (French band)]], French boyband  
* [[C4 (mixtape)|''C4'' (mixtape)]], mixtape by American rapper Kendrick Lamar
* C<sub>4</sub>, scientific pitch notation for the note "[[Middle C]]" (261.626&nbsp;Hz)
* [[C4 Records]], a record label

===Other uses in arts, entertainment and media===
* [[C4 (New Zealand TV channel)]], a former New Zealand television music channel
* 1. c4, also called the [[English Opening]], a chess opening
* The abbreviation for British TV channel [[Channel 4]].

==Mathematics, science and technology==
===Biology===
* C4: an EEG electrode site according to the [[10-20 system (EEG)|10-20 system]]
* [[Apolipoprotein C4]], a protein encoded by the ''APOC4'' gene 
* [[c4 antisense RNA]], a non-coding RNA
* [[ATC code C04]] ''Peripheral vasodilators'', a subgroup of the Anatomical Therapeutic Chemical Classification System
* [[C4 carbon fixation|C<sub>4</sub> carbon fixation]], a pathway for carbon fixation in photosynthesis that produces C4 plants
* [[Cervical spinal nerve 4]], a nerve originating in the neck
* [[Cervical vertebra 4]], one of the cervical vertebrae of the vertebral column
* C04, [[oral cancer]] ICD-10 code
*[[Complement component 4]], a protein involved in the intricate [[complement system]], encoded by ''C4A'' or ''C4B'' gene in humans
*C<sub>4</sub> fragments, one of the types of products of [[catabolism]] pathways

===Mathematics===
* <math>C_4</math>, the [[cyclic group]] of order 4
* C4, the fourth pure "core" module in the [[Edexcel]] A-level mathematics examination

===Other uses in science and technology===
* [[C-4 (explosive)]], a high explosive solid
* C4, butyl-type hydrocarbon chain, a type of [[four-carbon molecule]], especially in C4 reversed-phase chromatography columns
* [[Cluster 4]], an ESA satellite that studies the Earth's magnetosphere over the course of an entire solar cycle
* [[C-4 Protective Mask]], standard issue gas mask of the Canadian Armed Forces.

==Organizations==
* [[C4 (Colombia)]], a political party in Colombia
* C4, a social welfare non-profit entity organized under section [[501(c) organization#501(c)(4)|501(c)(4)]] of the U.S. Internal Revenue Code
* [[Churches Covered and Connected in Covenant]], a religious association founded by [[Archbishop LeRoy Bailey Jr.]]
*[[Craiova Group]], a cooperation project of four European states

==Sports ==
* [[C4 (classification)]], a Paralympic cycling classification
* C-4, professional wrestler [[Paul Burchill]]'s name for his finishing move, a moonsault uranage
* C4, an abbreviation for a four-man Sprint Canoe, see [[Canoe racing]]
* C4, a term used to refer to the [[UEFA Intertoto Cup]], a football competition (mainly used in non-English speaking countries)
* C4 level, a [[challenge square dance]] program at the Challenge 4 level

== Stationery ==
* C4, an international standard [[paper size]] (229 × 324&nbsp;mm), defined in ISO 216
* C4, the [[envelope size]] matching the A4 paper size

== Vehicles ==
===Aircraft===
* C-4, the US Army designation of the [[Ford Trimotor]]
* [[AEG C.IV]], a German World War I reconnaissance aircraft
* [[AGO C.IV]], a 1917 German reconnaissance aircraft
* [[C-4 Academe]], the military version of Gulfstream I twin turboprop business aircraft
* [[C-4 Argonaut]], a Canadair aircraft derived from the Douglas DC-4
* [[Cierva C.4]], a 1922 Spanish experimental autogyro
* [[DFW C.IV]], a 1916 German reconnaissance aircraft
* [[Flight Design C4]], a four-seat light aircraft
* [[Fokker C.IV]], a 1923 Dutch two-seat reconnaissance aircraft
* [[Rumpler C.IV]], a 1917 German single-engine, two-seater reconnaissance biplane

===Automobiles===
* C4, a class of [[Audi 100]] and Audi A6 cars
* [[Chevrolet Corvette (C4)]], the fourth production design of the Chevrolet Corvette
* [[Citroën C4]], a car made by Citroën
* [[Coloni C4]], a Formula One car built by Enzo Coloni Racing Car Systems
* [[Sauber C4]], a Sauber sportscar
* [[Spyker C4]], a [[Spyker]] car

===Locomotives===
* [[Bavarian C IV]], an 1884 German steam locomotive
* GS&WR Class C4, a [[Great Southern and Western Railway]] Irish steam locomotive
* [[LNER Class C4]], a class of British steam locomotives

===Ships===
* [[HMS C4|HMS ''C4'']], a British C class submarine of the Royal Navy
* [[Type C4 ship]], merchant cargo ships of United States Maritime Commission "C" design
* [[USS C-4 (SS-15)|USS ''C-4'' (SS-15)]], a United States C class submarine of the United States Navy
* [[USS Philadelphia (C-4)|USS ''Philadelphia'' (C-4)]], a protected cruiser of the United States Navy

===Vehicle components===
* [[Ford C4 transmission]], an automatic transmission
* [[Menasco C4]], a 1930s 4-cylinder, air-cooled, in-line, inverted, aero-engine

==Weapons==
* [[C-4 (explosive)]], a type of plastic explosive
* [[Hafdasa C-4]], an Argentine submachine gun

== Other uses ==
* C4, a variation of [[Command and control]], meaning "Command, Control, Communications and Computers"
* C4, the monogram of [[Christian IV of Denmark]], used in the city arms of Kristianstad, Sweden since 1622
* C4 Extreme, a sports nutrition supplement product line by [[Cellucor]], which includes [[Energy drink|C4 energy drinks]]. 

== See also ==
{{canned search|C4|C-4}}
*{{intitle|C-4s}}
*{{intitle|C-4}}
*{{intitle|C4s}}
*{{intitle|C4}}
* [[4C (disambiguation)]]
* [[CCCC (disambiguation)]]
* [[CIV (disambiguation)]] <!-- because [[C IV]] etc. redirect here -->

{{Letter-Number Combination Disambiguation}}