C3

C3, C-3, C.3, C03, C.III or C-IIImay refer to:
* C₃, the chemical symbol for tricarbon, a molecule found in interstellar space
* C₃, a symbol for characteristic energy, which in astrodynamics is equal to the square of the hyperbolic excess velocity
* C3, the code for permission to use specific land or premises for dwellings in town and country planning in the United Kingdom
* C3, the UEFA Cup in football
* C3, a standard paper size defined in ISO 216
* C3, a plastic explosive
* C3, an urban music artist, born Cortlandt Cole
* C³, Command, control, and communications, a military concept
* C3 or C3C anemometer from Second Wind
* C-3, a United States military designation for the Ford Trimotor
* the designation for several German World War I and World War II armed reconnaissance aircraft
** AEG C.III
** AGO C.III, a reconnaissance biplane of World War I
** Albatros C.III
** DFW C.III, a
* C3 carbon fixation in plants
* C3-convertase, an enzyme
* C3 linearization, a computer science algorithm
* C-3 Martin, a U.S. military transport aircraft
* C3 type submarine, a WWII Imperial Japanese Navy cargo carrier submarine
* Apolipoprotein C3, a human very low density lipoprotein
* ATC code C03, a section of the Anatomical Therapeutic Chemical Classification System
* Bavarian C III, a German steam locomotive model
* Bavarian C III (Ostbahn), a 1867 German steam locomotive model
* Chevrolet Corvette C3, the third production design of the Chevrolet Corvette
* Cierva C.3, a 1921 Spanish experimental autogyro
* Citroën C3, a car
* Cytochrome-c3 hydrogenase, an enzyme
* DSER Class C3, a Dublin and South Eastern Railway
* Haplogroup C3 (Y-DNA)
* HMS "C3", a British C class submarine
* LB&SCR C3 class, a British
* London Buses route C3, a Transport for London contracted bus route
* Nimrod NRA/C3, a 1983 Group C racing car never achieved
* NAG C.III, an engine powering the Gotha G.IV aircraft
* Saturn C-3, a 1960 rocket in the Saturn C series
* Tippmann C-3, a Pump-Action Paintball marker that uses propane gas
* USS "C-3" (SS-14), a United States C class submarine
* USS "Baltimore" (C-3), a protected cruiser of the United States Navy
* VIA C3, a computer processor
* Yamaha C3, a 2007 liquid cooled 49cc four-stroke motor scooter
* C3 - The Long Island Rail Road's designation for Kawasaki-built Bi-Level coaches

and also :
* In human anatomy, C3 may refer to::* Cervical vertebra 3, one of the cervical vertebrae of the vertebral column:* Cervical spinal nerve 3
* a model of Hammond organ
* High C in music (c3 in European notation)
* Independent Carrier IATA airline designator
* Low C in music (C3 in American notation)
* Chaos Communication Congress, the biggest annual hacker event in Europe
* Christian City Church, a worldwide Pentecostal denomination
* Chrysler Comprehensive Compensation System, important in the development of Extreme Programming
* Clinical Cell Culture, a medical technology company
* Complement component 3, a protein of the innate immune system
* Creatures 3, a video game
* Cubed³, a British video game website
* Tha Carter III, the title of an album by rapper Lil Wayne
* C|3, a vehicle telematics product offered by Autopage USA and Crayon Interface
* C03, Malignant neoplasm of gum ICD-10 code
* a class in FM radio broadcasting in North America
* Cost, Comfort, Convenience, a department store in India

See also

* CCC