C4
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)
- Omotesandō Station, a Tokyo Metro subway station (station number: C-04)
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 (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, 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), mixtape by American rapper Kendrick Lamar
- C4, scientific pitch notation for the note "Middle C" (261.626 Hz)
- C4 Records, a record label
- Tha Carter IV, album by American rapper Lil Wayne
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
- Channel 4, 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, 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, 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
- C4 fragments, one of the types of products of catabolism pathways
Mathematics
- , 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
- 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
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.
- 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 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, 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), 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, 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
- All pages with titles containing C-4s
- All pages with titles containing C-4
- All pages with titles containing C4s
- All pages with titles containing C4
- 4C (disambiguation)
- CCCC (disambiguation)
- CIV (disambiguation)
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