Ic

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

Computing

• Index of coincidence, in cryptography
• Integrated circuit, a set of electronic circuits on a semiconductor chip
• Interactive C, a programming language for robotic controllers
• Interconnection, physical linking of a telecommunication carrier's network

Language

• -ić or -ič, a family name suffix in South Slavic languages
• -ic, a suffix in English
• i.c., shorthand for in casu, Latin for 'in this case'
• ic, an Old English pronoun
• Christogram, combination of letters that forms an abbreviation for the name of Jesus Christ
• Independent clause, a grammatical clause

Law

• IC codes, police shorthand expressions for apparent ethnicity
• Informed consent, in clinical trials the form that has to be signed by the patient (subject) before entering the study
• United States Intelligence Community, a group of government agencies

Schools

• Illinois College, Jacksonville, Illinois, US
• Imperial College London, UK
• International College, Beirut, Lebanon
• Ithaca College, Ithaca, New York, US

Science

• Ice I_c, a metastable cubic crystalline variant of ice
• Index Catalogue, a nebula and other object catalogue used in astronomy
• Inferior colliculus, a part of the midbrain
• Intensive care medicine
• Interchangeable core, a type of lock cylinder
• Intermittent catheterisation, a method of relieving the bladder
• Interstitial cystitis, a disease
• Ion chromatography
• Ionization chamber, a type of radiation detector
• Irreducible complexity
• Isolation condenser, a passive cooling system for boiling water nuclear reactors
• Type Ic supernova, a subtype of Type I supernova
• I_C, or collector current, in bipolar junction transistors
• Inhibitory Concentration, as in half maximal inhibitory concentration (IC₅₀)
• Inspiratory capacity, a measure of lung volumes

Transportation

• IC Bus, a bus manufacturer
• Illinois Central Railroad (reporting mark IC)
• Indian Airlines (IATA airline designator IC)
• Intercités, classic long-distance passenger day and night train services in France operated by SNCF
• InterCity, certain long-distance passenger train services in Europe

Others

• Ingobamakhosi Carbineers, an infantry regiment of the South African Army
• Identity card
• Impuls IC, a German hang glider design
• Incident commander, person responsible for all aspects of an emergency response
• Indifference curve, in economics
• Industry Canada, a division of the Canadian government
• Information coefficient, in economics
• InterContinental, a hotel chain, or its parent company InterContinental Hotels Group
• Internal control, in accounting
• International Canoe, a powerful and fast single-handed sailing canoe
• Intimacy coordinator, staff member on theater, film and television productions
• Iron Cross (Burmese band)
• Canary Islands (ISO 3166-1 code: IC)
• IC, postnominal letters for a member of the Rosminians, officially the Institute of Charity