Ic

IC, ic, or i.c. may stand for:

In computing and technology:

• .ic.gov, a second-level domain name administered by the US Government for members of the intelligence community
• Integrated circuit
• Initial condition
• Interactive C, a programming language for robotic controllers
• International Coordinator, the top coordinator of the FidoNet
• Interchangeable core or interchangeable core lock cylinder
• Internal combustion engine
• Intercooler
• Intrusion Countermeasures
• Instrument cluster

In education:

• Instituto Cervantes
• Ithaca College, Ithaca, NY, USA
• Illinois College, Jacksonville, IL, USA
• Imperial College London, UK
• International College, Beirut, Lebanon

In entertainment:

• WWE Intercontinental Championship
• International Canoe
• Infinite Challenge, the top-rating South Korean TV program
• In Character, as opposed to OOC (Out of Character)

In finance:

• Invested Capital

In economics:

• Indifference Curve

In humanities:

• a Christogram
• Irreducible complexity
• Intellectual capital

In language:

• -ic suffix
• iċ, an old English pronoun
• IC codes, police shorthand expressions for apparent ethnicity
• i.c., shorthand for in casu, Latin for 'in this case'
• Index of coincidence
• Internet slang for "I See"

In medicine:

• Inferior colliculus, a part of the midbrain
• Inspiratory capacity, a measure of lung function
• Intensive care medicine
• Interstitial cystitis, a disease
• Informed consent, in clinical trials the form that has to be signed by the patient (subject) before entering the study

In science and mathematics:

• axiom assuming the existence of an inaccessible cardinal
• Index Catalogue, a nebula and other object catalogue used in Astronomy
• a rare short version of the Roman numeral XCIX (99)
• Index Catalogue in astronomy
• Ion Chromatography
• Ionization chamber
• Ic or I-c, a subtype of Type I supernova, see Type Ib and Ic supernovae
• Ice Ic
• Inhibitory Concentration, as in half maximal inhibitory concentration (IC50)

Organizations and companies:

• IC Bus, a bus manufacturer
• Industry Canada, division of the Canadian government
• Intelligence Community, a federation of United States agencies and organizations which conduct intelligence activities
• Intentional Community
• InterContinental hotel chain, or its parent company InterContinental Hotels Group
• Invisible Children Inc., a non-profit for kids in Africa, or Invisible Children, the movie behind the non-profit.

Military:

• Interceptort Controller (IC) an Officer in NATO Control and Reporting Centre (CRC)
• Military terminology for 'In Command' or 'In Charge', often preceded by an 'O' to indicate an Officer or 'NCO' for a Non-Commissioned Officer.

Places:

• Canary Islands' ISO 3166-1 code
• Iowa City, Iowa, USA
• Ithaca College, USA
• The Information Commons, 24hr Library at Sheffield University, United Kingdom

Religion:

• IC after a name indicates a member of the Rosminians, officially the Institute of Charity

In transport:

• Ice Crystals' METAR code
• Illinois Central Railroad
• Air India (flights formerly operated by Indian Airlines)' IATA airline designator
• InterCity certain long-distance passenger train services in Europe

Other:

• Identity card
• Impuls IC, a German hang glider design
• Incident commander
• Indianapolis Colts, an NFL football team
• Interstate commerce
• Ice cream, sometimes abbreviated “IC”