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Topics referred to by the same term
Look up C4 or c4 in Wiktionary, the free dictionary. C4, C04, C.IV, C-4, or C-04 often refers to the explosive. It may also refer to: Caldwell 4 or NGC
C4
Compact car
The Citroën C4 is a car produced by Citroën, part of Stellantis. It was positioned to be the successor to the Citroën Xsara. The first generation production
Citroën_C4
Variety of plastic explosive
Brian. "Grosse Point Blank Microwave C4 Mercury Switch". Carnegie Mellon University. Retrieved 14 July 2014. "C4 product page". Ribbands Explosives. Archived
C-4_(explosive)
American energy drink brand
company’s C4 pre-workout line, and later expanded into multiple ranges including C4 Performance Energy (16 oz; labeled 200 mg caffeine), C4 Smart Energy
C4_Energy
Compact multi-purpose vehicle manufactured by Citroën
The Citroën C4 SpaceTourer (formerly the Citroën C4 Picasso) is a five-seater car produced by French manufacturer Citroën with a seven-seater version
Citroën_C4_Picasso
Fourth generation of the Corvette sports car
The Chevrolet Corvette (C4) is the fourth generation of the Corvette sports car, manufactured and marketed by the Chevrolet division of General Motors
Chevrolet_Corvette_(C4)
Algorithm for making decision trees
C4.5 is an algorithm used to generate a decision tree developed by Ross Quinlan. C4.5 is an extension of Quinlan's earlier ID3 algorithm. The decision
C4.5_algorithm
Photosynthetic process in some plants
C4 carbon fixation or the Hatch–Slack pathway is one of three known photosynthetic processes of carbon fixation in plants. It owes the names to the 1960s
C4_carbon_fixation
Technique for modelling software architecture
The C4 model is a lean graphical notation technique for modeling the architecture of software systems. It is based on a structural decomposition (a hierarchical
C4_model
Grime MC from Birmingham, England
were playlisted on BBC Radio 1Xtra. C4's real name is Chanda Gerald from which he derived the C in C4. As a boy, C4 sang in his local church choir. His
C4_(rapper)
Motor vehicle
Citroën C4 Aircross is a compact crossover SUV. It was unveiled at the 2012 Geneva Motor Show. In October 2011, it was confirmed that the C4 Aircross
Citroën_C4_Aircross
In botany, C4 carbon fixation is one of three known methods of photosynthesis used by plants. C4 plants increase their photosynthetic efficiency by reducing
List_of_C4_plants
New Zealand television 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
C4_(New_Zealand_TV_channel)
Chess 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
English_Opening
Biological process to convert light into chemical energy
of the leaf. C4 plants can produce more sugar than C3 plants in conditions of high light and temperature. Many important crop plants are C4 plants, including
Photosynthesis
Subcompact crossover SUV
The Citroën C4 Cactus is a subcompact crossover SUV, produced by French automaker Citroën in Spain between April 2014 and December 2017, with production
Citroën_C4_Cactus
Motor vehicle
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
Ford_C4_transmission
2009 mixtape by K.Dot
C4 is the third solo mixtape by American rapper Kendrick Lamar, then known as K.Dot, released on January 30, 2009, through Top Dawg Entertainment (TDE)
C4_(mixtape)
American sports nutrition and supplement company
included C4 Original, Alpha Amino, NO3, P6, and SuperHD. The brand also launched C4 Mass, C4 Ripped, C4 50x, and C4 RTD. In subsequent years, the C4 line
Cellucor
Upcoming European women's volleyball tournament
Filenin%20Sultanlar%C4%B1'n%C4%B1n%202026%20CEV%20Avrupa%20%C5%9Eampiyonas%C4%B1%20Ma%C3%A7%20Program%C4%B1%20Belli,%C5%9Eampiyonas%C4%B1nda%20grup%20etab%C4
2026 Women's European Volleyball Championship
2026_Women's_European_Volleyball_Championship
Para-cycling classification
C4 is a para-cycling classification. It includes people with lower limb impairments or issues with lower limb functionality. Disability groups covered
C4_(classification)
New gas and mixture of gases for high voltage switchgear
C4-FN (C4-fluoronitrile, C4FN) is a perfluorinated compound developed as an extremely high-dielectric gas for high-voltage switchgear. It has the structure
C4-FN
Cargo ships built by the United States Maritime Commission
The Type C4 ships were the largest cargo ships built by the United States Maritime Commission (MARCOM) during World War II. The design was originally developed
Type_C4_ship
Angolan kizomba musician
July 1983), better known by his stage name C4 Pedro, is an Angolan musician. Son of the singer Lisboa Santos, C4 Pedro was born in Luanda on 7 July 1983
C4_Pedro
Australian para-cyclist (born 1994)
Championships and won gold medals in the elimination C4, 1 km time trial C4, and scratch race C4 events. In August 2026, she competed at the 2026 Commonwealth
Tara_Neyland
The Spartan C4 was an American four-seat cabin monoplane designed and built by the Spartan Aircraft Company. The first model was the C4-225 a high-wing
Spartan_C4
Executive car series produced by Audi
of the Audi 100 lineage, with the initial A6 designated as a member of the C4-series, followed by the C5, C6, C7, C8 and the C9. The related Audi A7 is
Audi_A6
Spinal nerve of the cervical segment
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
Cervical_spinal_nerve_4
World Rally Car
The Citroën C4 WRC is a World Rally Car built for the Citroën World Rally Team by Citroën Racing to compete in the World Rally Championship. It is based
Citroën_C4_WRC
2023 video game
Rubicon once thought to have been destroyed in a cataclysm. The main character, C4-621, is a cyborg mercenary pilot who, after meeting a Rubiconian named Ayre
Armored Core VI: Fires of Rubicon
Armored_Core_VI:_Fires_of_Rubicon
and the expansion of the para-cycling program to include C1-3 men's and C4-5 women's events, while the women's team sprint and time trial events were
Track cycling at the 2026 Commonwealth Games
Track_cycling_at_the_2026_Commonwealth_Games
Proprietary computer game engine developed by Terathon Software
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
C4_Engine
Macintosh software developers 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
C4_(conference)
British paralympic athlete (born 1991)
is a parasport athlete competing in T38 para-athletics sprint events and C4 para-cycling and British television presenter. She was part of the 2015 IPC
Kadeena_Cox
Motor vehicle
The Citroën C4 and C6 models were designed to replace the Citroën Type A 10 hp and Citroën Type B model family cars. The styling of the two models was
Citroën_C4_&_C6
British free-to-air television channel
Channel 4 (C4) is a British free-to-air public broadcast television channel owned and operated by Channel Four Television Corporation. It is publicly owned
Channel_4
Genus of flowering plants
which to study the evolution of C4 photosynthesis. Morphological differences that demonstrate the transition from C3 to C4 include C3 species having leaves
Cleome
Digital warfare branch of the Singapore Armed Forces
Community created in April 2012, Defence Cyber Organisation in March 2017, SAF C4 Command in November 2017, and the Cybersecurity Task Force in December 2020
Digital and Intelligence Service
Digital_and_Intelligence_Service
Chess opening
dark-squared bishop trade by ...Be7–g5. However, because White has not played c4 yet, White also has more options, and often plays Nc3 while the pawn remains
Benoni_Defense
Protein involved in the immune system
Complement component 4 (C4), in humans, is a protein involved in the intricate complement system, originating from the human leukocyte antigen (HLA) system
Complement_component_4
Genus of flowering plants
C3–C4 intermediate Flaveria anomala - Mexico (San Luis Potosí, Nuevo León, Durango, Zacatecas) Flaveria australasica - speedyweed - Australia; C4 Flaveria
Flaveria
Overview of the UK broadcast network's shows
Animations; on C4 1990; moved to the BBC in 1993) Angry Kid (Aardman Animations; on C4 1998–2002) The Bear (1998) Beavis and Butt-Head (US import; on C4 1994–1999)
List of Channel 4 television programmes
List_of_Channel_4_television_programmes
Chess opening
opening where White plays d4 and c4 and fianchettoes the white bishop on g2. A common opening sequence is 1.d4 Nf6 2.c4 e6 3.g3, although various other
Catalan_Opening
Chess opening
Queen's Gambit is the chess opening that begins with the moves: 1. d4 d5 2. c4 It is one of the oldest openings and is still commonly played today. It is
Queen's_Gambit
Class of enzymes
Sphinganine C4-monooxygenase (EC 1.14.13.169, sphingolipid C4-hydroxylase, SUR2 (gene), SBH1 (gene), SBH2 (gene)) is an enzyme with systematic name sphinganine
Sphinganine_C4-monooxygenase
Chess opening
are not considered "Indian" openings. The usual second move for White is 2.c4, grabbing a larger share of the centre and preparing for 3.Nc3, which itself
Indian_Defence
Motor vehicle
The Amilcar C4 is a light sporting car designed for road use made between 1922 and 1929 by the French Amilcar company. The C4 is one of three models introduced
Amilcar_C4
Racing car model
The Coloni C4 is a Formula One car designed by Christian Vanderpleyn for the Coloni team for use in the 1991 Formula One season, although it never qualified
Coloni_C4
Cell line
C4, C5, and C4-2 sublines contained most of the marker chromosomes, with the M subline being most similar to the parental LNCaP cells. C4, C5 and C4-2
LNCaP
German light aircraft
The Flight Design C4 is a German four seat, high-wing, single engine light aircraft under development by Flight Design of Leinfelden-Echterdingen. In February
Flight_Design_C4
Smartphone model
The Sony Xperia C4 is a mid-range Android smartphone developed and manufactured by Sony and it serves as the successor of the Xperia C3. The phone was
Sony_Xperia_C4
Chemical compound
Leukotriene C4 (LTC4) is a leukotriene. LTC4 has been extensively studied in the context of allergy and asthma. In cells of myeloid origin such as mast
Leukotriene_C4
US Marine Corps vehicle development program
Command, Control, Communications and Computers/Unmanned Aircraft Systems (ARV C4/UAS) version, and the second variant is the ARV-30, which is a variant armed
Advanced Reconnaissance Vehicle
Advanced_Reconnaissance_Vehicle
French car brand of Stellantis
Spain (Madrid): C4 Cactus Spain (Opel Zaragoza): C3 Aircross Spain (Vigo): Berlingo First, Berlingo, Xsara Picasso, C4 Picasso / C4 Grand Picasso, C-Elysee
Citroën
Classical singing voice with the highest vocal range
vocal range (using scientific pitch notation) is from approximately middle C (C4) = 261 Hz to A5 in choral music, or to soprano C (C6) or higher in operatic
Soprano
Initial moves of a chess game
such as the Reversed Sicilian (1.c4 e5), the Symmetrical Variation (1.c4 c5), and the Mikėnas–Carls Variation (1.c4 Nf6 2.Nc3 e6 3.e4). Play can proceed
Chess_opening
Chess opening
sources[dubious – discuss] define the Réti more narrowly as the sequence 1.Nf3 d5 2.c4, which happens to be the most common independent variation of the Zukertort
Zukertort_Opening
Australian Paralympic cyclist
Women's Individual Pursuit C4, setting a new world record in the process, and a silver medal in the Women's Individual Pursuit C4. At the 2016 Rio Paralympics
Susan_Powell_(cyclist)
Chess opening
Bd3 (main line) 6...Nc6 7.0-0 Be7 8.c4 (Jaenisch Variation) 8.Re1 6...Bd6 7.0-0 0-0 8.c4 c6 (Staunton Variation) 8.c4 Bg4 (Marshall Variation) 6...Be7 7
Petrov's_Defence
Series of interconnected biochemical reactions
metabolic pathways for carbon fixation in photosynthesis, the other two being C4 and CAM. This process converts carbon dioxide and ribulose bisphosphate (RuBP
C3_carbon_fixation
2024 Malaysian Tamil-language romantic comedy film directed by Karthik Shamalan
C4 Cinta (transl. C4 love) also abbreviated as #C4C is a 2024 Malaysian Tamil-language romantic comedy film written and directed by Karthik Shaamalan.
C4_Cinta
metabolic pathways by which photosynthesis is carried out: C3 photosynthesis, C4 photosynthesis, and CAM photosynthesis. C3 photosynthesis is the oldest and
Evolution_of_photosynthesis
Protein family
The C4-dicarboxylate uptake family or Dcu family (TC# 2.A.13) is a family of transmembrane ion transporters found in bacteria. Their function is to exchange
Dcu_family
American class of submarine-launched ballistic missile
built in two variants: the I (C4) UGM-96A and II (D5) UGM-133A; however, these two missiles have little in common. While the C4, formerly known as EXPO (extended
Trident_(missile)
Alternative propulsion includes the following: Biofuel Citroëns include the Citroën C4 BioFlex (bioethanol flexible fuel vehicle). In the earlier years, electric
List_of_Citroën_vehicles
Protein-coding gene in the species Homo sapiens
Leukotriene C4 synthase is an enzyme that in humans is encoded by the LTC4S gene. The protein encoded by this gene, LTC4S (or glutathione S-transferase
Leukotriene_C4_synthase
Subcompact crossover SUV
base version is launched in 2018. It is known as the C4 Aircross (full name: Dongfeng Citroën Yunyi C4 Aircross). Its wheelbase at 2,655 mm is 11.5 centimetres
Citroën_C3_Aircross
Chemical compound
Δ9-Tetrahydrocannabutol (Δ9-THCB, THC-B, tetrahydrocannabinol-C4, THC-C4, (C4)-Δ9-THC, or butyl-THC) is a phytocannabinoid found in cannabis that is a
Tetrahydrocannabutol
Racing car
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
Sauber_C4
Military command agreement
abbreviation for the naval Command, Control, Communications and Computers (C4) interoperability organization involving the Anglosphere nations of Australia
AUSCANNZUKUS
road race C4-5 cycling event at the 2024 Summer Paralympics took place on 6 September 2024. 16 riders competed in the event. The event is for C4 and C5 athletes
Cycling at the 2024 Summer Paralympics – Women's road race C4–5
Cycling_at_the_2024_Summer_Paralympics_–_Women's_road_race_C4–5
RNA family
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
C4_antisense_RNA
The Men's time trial C4 road cycling event at the 2024 Summer Paralympics took place on 4 September 2024, at Clichy-sous-Bois, Paris. 13 riders competed
Cycling at the 2024 Summer Paralympics – Men's road time trial C4
Cycling_at_the_2024_Summer_Paralympics_–_Men's_road_time_trial_C4
The men's time trial class C4-5 track cycling event at the 2024 Summer Paralympics took place on 30 August 2024 at the Vélodrom National at Saint-Quentin-en-Yvelines
Cycling at the 2024 Summer Paralympics – Men's time trial C4–5
Cycling_at_the_2024_Summer_Paralympics_–_Men's_time_trial_C4–5
Turbofan aircraft engine
of Defense - Special Electronic Mission Aircraft) Gulfstream G550 (BR710 C4-11) C-37B (USAF - VIP transport aircraft) EA-37B Compass Call (Italian Air
Rolls-Royce_BR700
New Zealand para-cyclist (born 2004)
Track World Championships and won silver medals in the time trial and omnium C4 events. At 18 years old, he was the youngest member for New Zealand's cycling
Devon_Briggs
PSLV-C4 was the fourth operational launch and overall seventh mission of the PSLV program. This launch was also the forty-eight launch by Indian Space
PSLV-C4
Submarine-launched ballistic missile which entered service in 1979
The UGM-96 Trident I, or Trident C4, was an American submarine-launched ballistic missile (SLBM), built by Lockheed Martin Space Systems in Sunnyvale,
UGM-96_Trident_I
2010 video game
strategy games. GamesRadar gave it a seven out of ten, but stated that C&C4 is a graphical step back and as a single-player experience, it is "a bust"
Command & Conquer 4: Tiberian Twilight
Command_&_Conquer_4:_Tiberian_Twilight
Chess opening
Queen's Gambit beginning with the moves: 1. d4 d5 2. c4 e6 Instead of taking the pawn offered by White on c4 (the Queen's Gambit Accepted), Black defends their
Queen's_Gambit_Declined
American guitarist (born 1956)
the latter being the drummer. In 2001, Batio released a CD with his band "C4," covering songs from his Holland years and including the original "Call to
Michael_Angelo_Batio
Motorsport division of Citroën
manufacturer in their name whilst they developed a new C4 World Rally Car. They returned fully with the C4 in the following year and began to dominate from
Citroën_Racing
4.c4 Nb6 5.f4 g5 Lasker Simul Gambit – B02 – 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 e6 6.Bc4 Matsukevich Gambit – B02 – 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6
List_of_chess_gambits
Motor vehicle
A single turbocharged 2.2-litre inline five-cylinder powered the original C4 version, and a 2.7-litre twin turbocharged V6 engine was found in the B5 generation
Audi_S4
Series of metro train types used in the Stockholm Metro from 1950 to 2024
Saltsjöbanan suburban railway. The Cx series includes the car types C1, C2, C3, C4, C5, C6, C7, C8, C9, C12, C13, C14 and C15. The first units (C1) entered service
SL_Cx
The Women's time trial C4 road cycling event at the 2024 Summer Paralympics took place on 4 September 2024, at Clichy-sous-Bois, Paris. Nine riders competed
Cycling at the 2024 Summer Paralympics – Women's road time trial C4
Cycling_at_the_2024_Summer_Paralympics_–_Women's_road_time_trial_C4
Musical instrument of the guitar family
most common tunings for the standard or soprano ukulele is C6 tuning: G4–C4–E4–A4, which is often remembered by the notes in the "My dog has fleas" jingle
Ukulele
Association football tournament in Qatar
States B4 Wales Group C Pos Team C1 Argentina C2 Saudi Arabia C3 Mexico C4 Poland Group D Pos Team D1 France D2 Australia D3 Denmark D4 Tunisia
2022_FIFA_World_Cup
Fighter aircraft model by Dornier
The Dornier Do 10, originally designated Dornier Do C4, was the name given by the Reichsluftfahrtministerium (RLM) of a pre-World War II German aircraft
Dornier_Do_10
Chess opening
Variation and the Four Pawns Attack. The Exchange Variation continues 3.d4 d6 4.c4 Nb6 5.exd6. White has some space advantage. Black can capitalise on the half-open
Alekhine's_Defence
Australian Paralympic cyclist
Championships in Saint-Quentin-en-Yvelines, France. In 2024, She is classified as C4 rider. At the 2022 UCI Para-cycling Track World Championships in Saint-Quentin-en-Yvelines
Erin_Rowell
Chess opening
playing 2.c4. More commonly, White will start with 2.g3. Some common variations are: c4 is played after g3 and Bg2; c4 is played after Nf3; and c4 is played
Dutch_Defence
Automobile platform for medium-sized cars by PSA Peugeot Citroën
2004–2010 Citroën C4 2007–2013 Peugeot 308 2009–2016 Peugeot 3008 2009–2012 Citroën C4 Sedan (C-Quatre) 2010–2015 Peugeot RCZ 2010–2018 Citroën C4 II 2011–2018
PSA_PF2_platform
Aerospace and defense division
when General Dynamics combined the company's C4 Systems and Advanced Information Systems. General Dynamics C4 Systems was originally owned by GTE and operated
General Dynamics Mission Systems
General_Dynamics_Mission_Systems
Class of 27 British 4-4-2 locomotives
Class C4/4 - which became more populated as Class C4/3s were cut down. By 1939, all Class C4/1s and Class C4/3s had been redesignated as either Class C4/2s
GCR_Class_8B
Protein family
In molecular biology, the type IV collagen C4 domain (or collagen IV NC1 domain) is a duplicated domain present at the C-terminus of type IV collagens
Type_IV_collagen_C4_domain
Chess opening
whose "traditional" or "classic method" begins with the moves: 1. Nf3 d5 2. c4 White attacks Black's pawn from the flank. If Black defends the pawn with
Réti_Opening
Chess opening and pawn structure
Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4. The Maróczy Bind opening is a continuation of the Sicilian Defence, Accelerated Dragon, where 5.c4 is the characteristic move
Maróczy_Bind
2025 British TV series or programme
Not Helping - C4 Sketch Show". British Comedy Guide. Retrieved 2025-08-28. televisual.com; Considine, Pippa (2025-08-15). "Trailer: C4 Mitchell and Webb
Mitchell and Webb Are Not Helping
Mitchell_and_Webb_Are_Not_Helping
The enzyme leukotriene-C4 synthase (EC 4.4.1.20) catalyzes the reaction leukotriene C4 ⇌ {\displaystyle \rightleftharpoons } leukotriene A4 + glutathione
Leukotriene-C4_synthase
C4
C4
C4
C4
C4
C4
C4
C4
C4