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

Computing

Index of coincidence In cryptography, coincidence counting is the technique (invented by William F. Friedman) of putting two texts side-by-side and counting the number of times that identical letters appear in the same position in both texts. This count, either as a ra ...

, in cryptography *

Integrated circuit An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuit 200px, A circuit built on a printed circuit board (PCB). An electronic circuit is composed of indiv ...

, a set of electronic circuits on a semiconductor chip *

Interactive C Interactive C is a program which uses a modified version of ANSI C with several libraries and features that allow hobbyists to program small robotics platforms. Version by Newton Research Labs Newton Research Labs developed Interactive C as a comp ...

, a programming language for robotic controllers *

Interconnection In telecommunication Telecommunication is the transmission of information by various types of technologies over wire A wire is a single usually cylindrical A cylinder (from Greek Greek may refer to: Greece Anything of, from, or ...

, physical linking of a telecommunication carrier's network

Language

-ić Surname In some cultures, a surname, family name, or last name is the portion of one's personal name A personal name, or full name, in onomastic Onomastics or onomatology is the study of the etymology, history, and use of proper names. ...

or -ič, a family name suffix in South Slavic languages *

-ic In chemical nomenclature, the IUPAC nomenclature of inorganic chemistry is a systematic name, systematic method of naming inorganic chemical compounds, as recommended by the International Union of Pure and Applied Chemistry (IUPAC). It is published ...

, a suffix in English * i.c., shorthand for ''in casu'', Latin for 'in this case' * ic, an Old English pronoun *

Christogram A Christogram (Latin ') is a monogram or combination of letters that forms an abbreviation for the name of Jesus Christ, traditionally used as a Christian symbolism, religious symbol within the Christian Church. One of the oldest Christograms i ...

, combination of letters that forms an abbreviation for the name of Jesus Christ *

Independent clause An independent clause (or main clause) is a clause In language A language is a structured system of communication Communication (from Latin ''communicare'', meaning "to share" or "to be in relation with") is "an apparent answer to t ...

, a grammatical clause

Law

IC codes IC codes (identity code) or 6+1 codes are codes used by the British police in radio communications and crime recording systems to describe the apparent ethnicity of a suspect or victim. Originating in the late 1970s, the codes are based on a police ...

, police shorthand expressions for apparent ethnicity *

Informed consent Informed consent is a principle in medical ethics Medical ethics is an applied branch of ethics Ethics or moral philosophy is a branch of philosophy Philosophy (from , ) is the study of general and fundamental questions, such as those a ...

, in clinical trials the form that has to be signed by the patient (subject) before entering the study *

United States Intelligence Community The United States Intelligence Community (IC) is a group of separate United States government The federal government of the United States (U.S. federal government or U.S. government) is the Federation#Federal governments, national go ...

, a group of government agencies

Schools

Illinois College Illinois College is a private liberal arts college in Jacksonville, Illinois. It is affiliated with the United Church of Christ and the Presbyterian Church (USA). It was the second college founded in Illinois, but the first to grant a degree (i ...

, Jacksonville, Illinois, US *

Imperial College London Imperial College London (legally Imperial College of Science, Technology and Medicine) is a Public university, public research university in London. Imperial grew out of Albert, Prince Consort, Prince Albert's Albertopolis, vision for a cultural ce ...

, UK *

International College, Beirut International College ( ar, انترناشونال كولدج), Beirut Beirut ( ; ar, بيروت, ) is the capital and largest city of Lebanon Lebanon (), officially known as the Lebanese Republic,''Republic of Lebanon'' is the most c ...

, Lebanon *

Ithaca College Ithaca College is a private college in the town of Ithaca (town), New York, Ithaca, New York. The college was founded by William Egbert in 1892 as a Music school, conservatory of music and is set against the backdrop of the city of Ithaca, New Yo ...

, Ithaca, New York, US

Science

* Ice I_c, a metastable cubic crystalline variant of ice *

Index Catalogue The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalog, astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxy, g ...

, a nebula and other object catalogue used in astronomy *

Inferior colliculus The inferior colliculus (IC) (Latin Latin (, or , ) is a classical language A classical language is a language A language is a structured system of communication Communication (from Latin ''communicare'', meaning "to share" o ...

, a part of the midbrain *

Intensive care medicine Intensive care medicine, also called critical care medicine, is a medical Specialty (medicine), specialty that deals with seriously or critically ill patients who have, are at risk of, or are recovering from conditions that may be life-threate ...

Interchangeable core An interchangeable core or IC is an adaptable locking key cylinder. Unlike a standard key cylinder, which is accessible for combinating only via Lock (security device), locking device disassembly, an interchangeable mechanism relies upon a specia ...

, a type of lock cylinder *

Intermittent catheterisation Intermittent Urinary catheterization, catheterization is a medical technique used in conditions where patients need either short term catheter-based management of the urinary bladder or as a daily habit for life. Intermittent catheterization is cons ...

, a method of relieving the bladder *

Interstitial cystitis Interstitial cystitis (IC), a type of bladder pain syndrome (BPS), is chronic pain Chronic pain is classified as pain Pain is a distressing feeling often caused by intense or damaging stimuli. The International Association for the Study of P ...

, a disease *

Ion chromatography Ion chromatography (or ion-exchange chromatography) separates ions and polar molecules based on their affinity to the ion exchanger. It works on almost any kind of Charge (chemistry), charged molecule—including large proteins, small nucleotid ...

Ionization chamber #REDIRECT Ionization chamber #REDIRECT Ionization chamber#REDIRECT Ionization chamber The ionization chamber is the simplest of all gas-filled radiation detectors, and is widely used for the detection and measurement of certain types of ionizing ra ...

, a type of radiation detector *

Irreducible complexity Irreducible complexity (IC) is the argument that certain biological systems cannot have evolution, evolved by successive small modifications to pre-existing functional systems through natural selection, because no less complex system would funct ...

Isolation condenser Boiling water reactor safety systems are nuclear safety systems constructed within boiling water reactors in order to prevent or mitigate environmental and health hazards in the event of accident or natural disaster. Like the pressurized water ...

, a passive cooling system for boiling water nuclear reactors *

Type Ic supernova Type Ib and Type Ic supernovae are categories of supernova A supernova ( plural: supernovae or supernovas, abbreviations: SN and SNe) is a powerful and luminous stellar explosion. This transient astronomical event occurs during the ...

, a subtype of Type I supernova * I_C, or collector current, in

bipolar junction transistor A bipolar junction transistor (BJT) is a type of transistor upright=1.4, gate Candi bentar, a typical Indonesian gate that is often found on the islands of Java">Indonesia.html" ;"title="Candi bentar, a typical Indonesia">Candi benta ...

s * Inhibitory Concentration, as in half maximal inhibitory concentration (

IC₅₀

) * Inspiratory capacity, a measure of

lung volumes Lung volumes and lung capacities refer to the volume Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance ( solid, liquid, gas, or plasma) or shape occupies or contains. Vo ...

Transportation

IC Bus IC Bus (originally IC Corporation) is an American bus manufacturer Bus manufacturing, a sector of the automotive industry, manufacturing, manufactures buses and coach (bus), coaches. History Bus manufacturing had its earliest origins in car ...

, a bus manufacturer *

Illinois Central Railroad The Illinois Central Railroad , sometimes called the Main Line of Mid-America, was a railroad Rail transport (also known as train transport) is a means of transferring passengers and goods on wheeled vehicles running on rails, which are l ...

(reporting mark IC) *

Indian Airlines Indian Airlines was a wholly owned subsidiary A subsidiary, subsidiary company or daughter company is a company (law), company owned or controlled by another company, which is called the parent company or holding company. Two subsidiaries ...

(IATA airline designator IC) *

Intercités Intercités (before September 2009: ''Corail Intercités'') is a brand name used by France France (), officially the French Republic (french: link=no, République française), is a transcontinental country This is a list of countries ...

, classic long-distance passenger day and night train services in France operated by SNCF *

InterCity InterCity (commonly abbreviated ''IC'' on timetables and tickets) is the classification applied to certain long-distance passenger train services in Europe. Such trains (in contrast to regional, local, or commuter trains) generally call at maj ...

, certain long-distance passenger train services in Europe

Others

Ingobamakhosi Carbineers The Ingobamakhosi Carbineers (formerly Natal Carbineers) is an Infantry regiment, infantry unit of the South African Army. History Origins The regiment traces its roots to 1854 but it was formally raised on 15 January 1855 and gazetted on 13 Ma ...

, an infantry regiment of the South African Army *

Identity card An identity document (also called a piece of identification or ID, or colloquially as papers) is any document A document is a writing, written, drawing, drawn, presented, or memorialized representation of thought, often the manifestation of n ...

Impuls IC The Impuls IC is a German high-wing A monoplane is a fixed-wing aircraft configuration with a single main wing plane, in contrast to a biplane or other multiplane (aeronautics), multiplane, which have multiple planes. A monoplane has inheren ...

, a German hang glider design *

Incident commander The incident commander is the person responsible for all aspects of an emergency response; including quickly developing incident objectives, managing all incident operations, application of resources as well as responsibility for all persons involv ...

, person responsible for all aspects of an emergency response *

Indifference curve In economics Economics () is a social science that studies the Production (economics), production, distribution (economics), distribution, and Consumption (economics), consumption of goods and services. Economics focuses on the behavi ...

, in economics *

Industry Canada Innovation, Science and Economic Development Canada (ISED; legally, the Department of Industry; french: Innovation, Sciences et Développement économique Canada) is the department Department may refer to: * Departmentalization, division of a larg ...

, a division of the Canadian government * Information coefficient, in economics *

InterContinental InterContinental Hotels & Resorts is a British luxury hotel brand created in 1946 by Pan Am Pan American World Airways, originally founded as Pan American Airways and commonly known as Pan Am, was the principal and largest international ai ...

, a hotel chain, or its parent company InterContinental Hotels Group *

Internal control Internal control, as defined by accounting Accounting or Accountancy is the measurement ' Measurement is the number, numerical quantification (science), quantification of the variable and attribute (research), attributes of an object or event, ...

, in accounting * International Canoe, a powerful and fast single-handed sailing canoe *

Canary Islands The Canary Islands (; es, Islas Canarias, ), also known informally as ''the Canaries'', is a Spanish archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster or collection of island ...

(ISO 3166-1 code: IC) * IC, postnominal letters for a member of the

Rosminians The Rosminians, officially the Institute of Charity or ''Societas a charitate nuncupata'' (postnominal initials of I.C.), are a Roman Catholic Roman or Romans usually refers to: *Rome, the capital city of Italy *Ancient Rome, Roman civilization fr ...

, officially the Institute of Charity {{disambiguation, geo