C4, C04, C.IV, C-4, or C-04 may refer to:

Places

* Caldwell 4 or NGC 7023 or

Iris Nebula The Iris Nebula (also known as NGC 7023 and Caldwell 4) is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487. The nebula, which ...

, a reflection nebula in the constellation Cepheus *

Circumferential Road 4 Circumferential Road 4 (C-4), informally known as the C-4 Road, is a network of roads and bridges that all together form the fourth beltway of Metro Manila in the Philippines. Spanning some , it connects the cities of Caloocan, Makati, Malabon, Man ...

or C-4, an arterial road of Manila, Philippines *

Ken-Ō Expressway The , or , is a partially completed ticket system toll expressway in Japan. It is owned and operated by the Central Nippon Expressway Company and East Nippon Expressway Company. In conjunction with the Tokyo Bay Aqua-Line and the Bayshore Route ...

(includes some sections of

Shin-Shōnan Bypass The (lit. New Shōnan Bypass) is a 4-laned toll road in Kanagawa Prefecture, Japan. It is owned and managed by Central Nippon Expressway Company. Overview Officially the road is designated as a bypass for National Route 1. It is also classif ...

), route C4 in Japan *

Omotesandō Station is a Tokyo Metro subway station located at the intersection of Omotesandō (Avenue Omotesandō) and Aoyama-dori (Aoyama Street) in Aoyama, Minato ward, Tokyo, Japan. Part of the Chiyoda Line platforms extends into Shibuya ward. Lines Omote-sa ...

, a Tokyo Metro subway station (station numbers C-04, G-02, H-02)

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 (MDP) alongside Tim Turner (a.k.a. "DubLT") and Joel Turner

Computing

C4 (conference) C4 was a Macintosh software developers conference held in Chicago, Illinois. The conference ran from 2006 through 2009. It was created by Jonathan Rentzsch after the demise of MacHack (convention), MacHack. In May 2010 Rentzsch announced that he wo ...

, a Macintosh software developers conference *

C4 Engine The C4 Engine is a proprietary computer game engine developed by Terathon Software that is used to create 3D games and other types of interactive virtual simulations for PlayStation 5, PlayStation 4, PlayStation 3, Windows ( XP and later), Mac OS ...

, a next-generation 3D game engine * C4 model (software), 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 Flip chip, also known as controlled collapse chip connection or its abbreviation, C4, is a method for interconnecting dies such as semiconductor devices, IC chips, integrated passive devices and microelectromechanical systems (MEMS), to externa ...

, 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) Michael Angelo Batio (), also known as Michael Angelo, Mike Batio or MAB, is an American heavy metal guitarist and columnist from Chicago, Illinois. He was the lead guitarist for the Los Angeles-based glam metal band Nitro in the late 1980s a ...

, a neo-classical metal band set up by Michael Angelo Batio * C4 (French band), French boyband * ''C4'' (mixtape), mixtape by American rapper Kendrick Lamar * C₄,

scientific pitch notation Scientific pitch notation (SPN), also known as American standard pitch notation (ASPN) and international pitch notation (IPN), is a method of specifying musical Pitch (music), pitch by combining a musical Note (music), note name (with accidental ...

for the note "

Middle C C or Do is the first note and semitone of the C major scale, the third note of the A minor scale (the relative minor of C major), and the fourth note (G, A, B, C) of the Guidonian hand, commonly pitched around 261.63 Hz. The actual frequen ...

" (261.626 Hz) * C4 Records, a record label * ''

Tha Carter IV ''Tha Carter IV'' is the ninth studio album by American rapper Lil Wayne, released on August 29, 2011, through Young Money Entertainment, Cash Money Records and Universal Republic Records. Recording sessions for the album began in late 2008, short ...

'', album by American rapper

Lil Wayne Dwayne Michael Carter Jr. (born September 27, 1982), known professionally as Lil Wayne, is an American rapper, singer, songwriter, and record executive. His career began in 1995, at the age of 12, when he was signed by rapper Birdman (rapper), ...

Other uses in arts, entertainment and media

C4 (New Zealand TV channel) C4 was a New Zealand television channel owned and operated by MediaWorks New Zealand. C4 was available on both digital terrestrial and satellite platforms and played music around the clock, including from their radio side from The Rock, The Ed ...

, a former New Zealand television music channel * 1. c4, also called the

English Opening The English Opening is a chess opening that begins with the move: :1. c4 A flank opening, it is the fourth most popular and, according to various databases, one of the four most successful of White's twenty possible first moves. White begins th ...

, a chess opening *

Channel 4 Channel 4 is a British free-to-air public broadcast television network operated by the state-owned enterprise, state-owned Channel Four Television Corporation. It began its transmission on 2 November 1982 and was established to provide a four ...

, a UK television channel broadcasting since 1982

Mathematics, science, and technology

Biology

* C4: an EEG electrode site according to the 10-20 system *

Apolipoprotein C4 Apolipoprotein C-IV, also known as apolipoprotein C4, is a protein that in humans is encoded by the ''APOC4'' gene. Function ''APOC4'' is a member of the apolipoprotein C In the field of molecular biology, apolipoprotein C is a family of four ...

, a protein encoded by the ''APOC4'' gene *

c4 antisense RNA The c4 antisense RNA is a non-coding RNA used by certain phages that infect bacteria. It was initially identified in the P1 and P7 phages of '' E. coli''. The identification of c4 antisense RNAs solved the mystery of the mechanism for regul ...

, a non-coding RNA *

ATC code C04 C04A Peripheral vasodilators C04AA 2-amino-1-phenylethanol derivatives :C04AA01 Isoxsuprine :C04AA02 Buphenine :C04AA31 Bamethan C04AB Imidazoline derivatives :C04AB01 Phentolamine :C04AB02 Tolazoline C04AC Nicotinic acid and derivatives :C0 ...

''Peripheral vasodilators'', a subgroup of the Anatomical Therapeutic Chemical Classification System * C₄ carbon fixation, a pathway for carbon fixation in photosynthesis that produces C4 plants *

Cervical spinal nerve 4 Cervical spinal nerve 4, also called C4, is a spinal nerve of the cervical segment. It originates from the spinal cord above the 4th cervical vertebra (C4). It contributes nerve fibers to the phrenic nerve, the motor nerve to the thoracoabdomi ...

, a nerve originating in the neck *

Cervical vertebra 4 In tetrapods, cervical vertebrae (singular: vertebra) are the vertebrae of the neck, immediately below the skull. Truncal vertebrae (divided into thoracic and lumbar vertebrae in mammals) lie caudal (toward the tail) of cervical vertebrae. In ...

, one of the cervical vertebrae of the vertebral column * C04,

oral cancer Oral cancer, also known as mouth cancer, is cancer of the lining of the lips, mouth, or upper throat. In the mouth, it most commonly starts as a painless white patch, that thickens, develops red patches, an ulcer, and continues to grow. When on ...

ICD-10 code *

Complement component 4 Complement component 4 (C4), in humans, is a protein involved in the intricate complement system, originating from the human leukocyte antigen (HLA) system. It serves a number of critical functions in immunity, tolerance, and autoimmunity with ...

, a protein involved in the intricate

complement system The complement system, also known as complement cascade, is a part of the immune system that enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and at ...

*C₄ fragments, one of the types of products of

catabolism Catabolism () is the set of metabolic pathways that breaks down molecules into smaller units that are either oxidized to release energy or used in other anabolic reactions. Catabolism breaks down large molecules (such as polysaccharides, lipids, ...

pathways

Math

C_4

, the

cyclic group In group theory, a branch of abstract algebra in pure mathematics, a cyclic group or monogenous group is a group, denoted C''n'', that is generated by a single element. That is, it is a set of invertible elements with a single associative bina ...

of order 4 * C4, the fourth pure "core" module in the

Edexcel Edexcel (also known since 2013 as Pearson Edexcel) is a British Multinational corporation, multinational education and examination body formed in 1996 and wholly owned by Pearson plc since 2005. It is the only privately owned examination board ...

A-level mathematics examination

Other uses in science and technology

* C4, butyl-type hydrocarbon chain, a type of

four-carbon molecule Four-carbon molecules are based on a skeleton made from four carbon atoms. They may be in a chain, branched chains, cycles or even bicyclic compounds Hydrocarbons that include four atoms are: *butane C4H10 *isobutane C4H10 *but-1-ene C4H8 * but-2 ...

, especially in C4 reversed-phase chromatography columns * Cluster 4 or Tango, an ESA satellite that studies the Earth's magnetosphere over the course of an entire solar cycle

Organizations

C4 (Colombia) This article lists political parties in Colombia. Colombia had historically maintained a two-party system, which means that there were two dominant political parties, resulting in considerable difficulty for anybody to achieve major electoral s ...

, a political party in Colombia * C4, a social welfare non-profit entity organized under section

501(c)(4) A 501(c) organization is a nonprofit organization in the Law of the United States#Federal law, federal law of the United States according to Internal Revenue Code (26 U.S.C. § 501(c)) and is one of over 29 types of nonprofit organizations exe ...

of the U.S. Internal Revenue Code *

Churches Covered and Connected in Covenant Church may refer to: Religion * Church (building), a building for Christian religious activities * Church (congregation), a local congregation of a Christian denomination * Church service, a formalized period of Christian communal worship * Chris ...

, a religious association founded by Archbishop LeRoy Bailey Jr. *

Craiova Group The Craiova Group (Quadrilateral), Craiova Four, or C4 is a cooperation project of four European statesRomania, Bulgaria, Greece and Serbiafor the purposes of furthering their European integration as well as economic, transport and energy coopera ...

a cooperation project of four European states –

Romania Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...

Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedon ...

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...

and

Serbia Serbia (, ; Serbian language, Serbian: , , ), officially the Republic of Serbia (Serbian language, Serbian: , , ), is a landlocked country in Southeast Europe, Southeastern and Central Europe, situated at the crossroads of the Pannonian Bas ...

– for the purposes of furthering their European integration as well as economic, transport and energy cooperation with one another.

Sports

* C4 (classification), a Paralympic cycling classification * C-4, professional wrestler

Paul Burchill Paul Birchall (born 8 October 1979), better known by his ring name Paul Burchill, is an English retired professional wrestler best known for his time with WWE. Prior to joining WWE, Burchill wrestled for the Frontier Wrestling Alliance and other ...

's name for his finishing move, a moonsault uranage * C4, an abbreviation for a four-man Sprint Canoe, see

Canoe racing A canoe is a lightweight narrow watercraft, water vessel, typically pointed at both ends and open on top, propelled by one or more seated or kneeling paddlers facing the direction of travel and using a single-bladed paddle. In British Englis ...

* C4, a term used to refer to the

UEFA Intertoto Cup The UEFA Intertoto Cup (from la, Inter, 'between' + german: toto, 'betting pool'),Most precisely, from (football pool); cf. often abbreviated and more known in the German-speaking world as UI Cup and originally called the International Foot ...

, a football competition (mainly used in non-English speaking countries) * C4 level, a

challenge square dance {{inline, date=February 2017 Challenge square dance, also known as Challenge dancing, is modern western square dance focused on the puzzle-solving aspects of square dancing at the most difficult or "challenging" levels. In modern square dancing, t ...

program at the Challenge 4 level

Stationery

* C4, an international standard

paper size Paper size standards govern the size of sheets of paper used as writing paper, stationery, cards, and for some printed documents. The ISO 216 standard, which includes the commonly used A4 size, is the international standard for paper size. ...

(229 × 324 mm), defined in ISO 216 * C4, the

envelope size An envelope is a common packaging item, usually made of thin, flat material. It is designed to contain a flat object, such as a letter (message), letter or Greeting card, card. Traditional envelopes are made from sheets of paper cut to one o ...

matching the A4 paper size

Vehicles

Aircraft

* C-4, the US Army designation of the

Ford Trimotor The Ford Trimotor (also called the "Tri-Motor", and nicknamed the "Tin Goose") is an American three-engined transport aircraft. Production started in 1925 by the companies of Henry Ford and ended on June 7, 1933, after 199 had been made. It w ...

AEG C.IV The AEG C.IV was a German two-seat biplane reconnaissance aircraft that entered service in 1916. Design and development The C.IV was based on the AEG C.II, but featured a larger wingspan and an additional forward-firing Spandau-type 7.92 mm ...

, a German World War I reconnaissance aircraft *

AGO C.IV The AGO C.IV was a First World War German biplane reconnaissance aircraft. Development A departure from the manufacturer's pod-and-boom designs, it featured a more conventional biplane layout whose only unusual feature was the tapered wings. L ...

, a 1917 German reconnaissance aircraft * C-4 Academe, the military version of Gulfstream I twin turboprop business aircraft *

C-4 Argonaut The Canadair North Star is a 1940s Canadian development, for Trans-Canada Air Lines (TCA), of the Douglas DC-4. Instead of radial piston engines used by the Douglas design, Canadair used Rolls-Royce Merlin V12 engines to achieve a higher cruisin ...

, a Canadair aircraft derived from the Douglas DC-4 *

Cierva C.4 __NOTOC__ The Cierva C.4 was an experimental autogiro built by Juan de la Cierva in Spain in 1922 which early the following year became the first autogyro to fly successfully. Failures of De la Cierva's attempts to compensate for dissymmetry of l ...

, a 1922 Spanish experimental autogyro *

DFW C.IV The DFW C.IV, DFW C.V, DFW C.VI, and DFW F37 were a family of German reconnaissance aircraft first used in 1916 in World War I. They were conventionally configured biplanes with unequal-span unstaggered wings and seating for the pilot and observer ...

, a 1916 German reconnaissance aircraft * Flight Design C4, a four-seat light aircraft *

Fokker C.IV The Fokker C.IV was a 1920s Dutch two-seat reconnaissance aircraft designed and built by Fokker. Design and development The C.IV was developed from the earlier C.I but it was a larger and more robust aircraft. The C.IV was designed as a recon ...

, a 1923 Dutch two-seat reconnaissance aircraft *

Rumpler C.IV The Rumpler C.IV was a German single-engine, two-seat reconnaissance biplane. It was a development of C.III with different tail surfaces and using a Mercedes D.IVa engine in place of the C.III's Benz Bz.IV. The Rumpler 6B 2 was a single-sea ...

, a 1917 German single-engine, two-seater reconnaissance biplane

Automobiles

* C4, a class of

Audi 100 The Audi 100 and Audi 200 (and sometimes called Audi 5000 in North America) are primarily mid-size/executive cars manufactured and marketed by the Audi division of the Volkswagen Group. The car was made from 1968 to 1997 across four generations (C ...

and Audi A6 cars *

Chevrolet Corvette C4 The Chevrolet Corvette (C4) is a sports car produced by American automobile manufacturer Chevrolet from 1983 until 1996. The convertible returned, as did higher performance engines, exemplified by the GM LT engine#LT5, LT5 found in the ZR-1. In ...

, the fourth production design of the Chevrolet Corvette *

Citroën C4 The Citroën C4 is a small family car/compact car (also classified as a compact crossover SUV since 2020) produced under their Citroën marque, from the French automaker PSA Group, and later Stellantis. It was positioned to be the successor to ...

, a car made by Citroën * Coloni C4, a Formula One car built by Enzo Coloni Racing Car Systems *

Sauber C4 The Sauber C4 was the fourth sports prototype racing car that Swiss Peter Sauber designed and developed. It was built in 1975. It competed in the European 2-Litre Sportscar Championship, where it managed to score 1 win and 5 podium finishes. It w ...

, a

Sauber Sauber Motorsport AG is a Swiss motorsport engineering company. It was founded in 1970 (as PP Sauber AG) by Peter Sauber, who progressed through hillclimbing and the World Sportscar Championship to reach Formula One in . After operating it u ...

sportscar *

Spyker C4 Spyker or Spijker was a Dutch carriage, automobile and aircraft manufacturer, started in 1880 by blacksmiths Jacobus and Hendrik-Jan Spijker. Originally located in Hilversum, the company relocated to Trompenburg, Amsterdam in 1898. Notable produ ...

, a

Spyker Spyker or Spijker was a Dutch carriage, automobile and aircraft manufacturer, started in 1880 by blacksmiths Jacobus and Hendrik-Jan Spijker. Originally located in Hilversum, the company relocated to Trompenburg, Amsterdam in 1898. Notable produ ...

car

Locomotives

Bavarian C IV The C IV was a steam locomotive, built for goods train duties, that was manufactured between 1884 and 1897 for the Royal Bavarian State Railways (''Königlich Bayerische Staatsbahn''). Description Between 1884 and 1893 a total of 87 units two- ...

, an 1884 German steam locomotive * GS&WR Class C4, a

Great Southern and Western Railway The Great Southern and Western Railway (GS&WR) was an Irish gauge () railway company in Ireland from 1844 until 1924. The GS&WR grew by building lines and making a series of takeovers, until in the late 19th and early 20th centuries it was the ...

Irish steam locomotive * LNER Class C4, a class of British steam locomotives

Ships

* HMS ''C4'', a British C class submarine of the Royal Navy *

Type C4 ship The Type C4-class ship were the largest cargo ships built by the United States Maritime Commission (MARCOM) during World War II. The design was originally developed for the American-Hawaiian Lines in 1941, but in late 1941 the plans were taken ov ...

, merchant cargo ships of United States Maritime Commission "C" design * USS ''C-4'' (SS-15), a United States C class submarine of the United States Navy * USS ''Philadelphia'' (C-4), a protected cruiser of the United States Navy

Vehicle components

Ford C4 transmission The Ford C4 is a three-speed, medium-duty automatic transmission introduced on 1964 model year vehicles and produced through 1981. The C4 was designed to be a lighter and simpler replacement for the original Ford-O-Matic two speed transmission bei ...

, an automatic transmission *

Menasco C4 The Menasco Pirate series were four-cylinder, air-cooled, in-line, inverted aero-engines, built by the Menasco Motors Company of Burbank, California, for use in light general and sport aircraft during the 1930s and 1940s. The Menasco engines c ...

, a 1930s 4-cylinder, air-cooled, in-line, inverted, aero-engine

Weapons

C-4 (explosive) C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C, which uses RDX as its explosive agent. C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or od ...

, a type of plastic explosive *

Hafdasa C-4 Hispano-Argentina was an Argentina, Argentine automotive and engineering company that manufactured car, automobiles, military vehicles, engines, weaponry, and parts for public works.Command and control Command and control (abbr. C2) is a "set of organizational and technical attributes and processes ... hatemploys human, physical, and information resources to solve problems and accomplish missions" to achieve the goals of an organization or en ...

, meaning "Command, Control, Communications and Computers" * C4, the monogram of

Christian IV of Denmark Christian IV (12 April 1577 – 28 February 1648) was King of Denmark and Norway and Duke of Holstein and Schleswig from 1588 until his death in 1648. His reign of 59 years, 330 days is the longest of Danish monarchs and Scandinavian monar ...

, used in the city arms of Kristianstad, Sweden since 1622 * C4 Extreme, a sports nutrition supplement product line by Cellucor