C4

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

Places

• Caldwell 4 or NGC 7023 or Iris Nebula, a reflection nebula in the constellation Cepheus
• Circumferential Road 4, a highway in the Philippines
• Omotesandō Station, a Tokyo Metro subway station (station numbers C-04, G-02, H-02)

People

• C4 (rapper), a rap music producer from Birmingham, England

Computing

• C4 (conference), a Macintosh software developers conference
• C4 Engine, a next-generation 3D game engine
• 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

Art, entertainment, and media

Music

• C4 (American band), a neo-classical metal band set up by Michael Angelo Batio
• C4 (Belgian band), Belgian rock band
• C4 (French band), French boyband
• C₄, scientific pitch notation for the note "Middle C" (261.626 Hz)
• C4 Records, a record label
• C4 (Kendrick Lamar mixtape)

Other art, entertainment and media

• C4 (TV channel), a former New Zealand television music channel
• 1. c4, also called the English Opening, a chess opening

Math, science and technology

Biology

• Apolipoprotein C4, a human gene
• ATC code C04 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, a nerve originating in the neck
• Cervical vertebra 4, one of the cervical vertebrae of the vertebral column
• Complement component 4, a protein
• C04, Oral cancer ICD-10 code

Math

• C4, the fourth pure "core" module in the Edexcel A-level mathematics examination

Other science and technology

• C4, butyl-type hydrocarbon chain with four carbon atoms, 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), a political party in Colombia
• C4, a social welfare non-profit entity organized under section 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.

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 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

Locomotives

• Bavarian C IV, an 1884 German steam locomotive
• GS&WR Class C4, a Great Southern and Western Railway Irish steam locomotive

Motorised wheeled vehicles

• 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

Ships

• HMS C4, a British C class submarine of the Royal Navy
• 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
• Type C4 ship, merchant cargo ships of United States Maritime Commission "C" design

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

See also

• CCCC (disambiguation)