ACI may refer to:

Aviation

Aero Club of India The Aero Club of India (ACI) is a Non-governmental organization, non-governmental governing body for air sports in India, recognised as the National Airsport Control representing India by the Fédération Aéronautique Internationale (FAI), sinc ...

, the apex body of all flying clubs and the governing body for air sports in India *

Aircalin Société Aircalin, also known as Air Calédonie International, is the flag carrier of the French collectivity of New Caledonia, with its headquarters in Nouméa. It operates scheduled services from its main hub at La Tontouta International A ...

, an airline (ICAO code: ACI) * Air Cargo Inc., an organization that provides information to the freight forwarding industry *

Airports Council International Airports Council International (ACI) is an organization of Airport authority, airport authorities, informing members of industry practices and airport standards. Established in 1991, its headquarters (ACI World) are based in Montreal, Quebec, Ca ...

, international trade group of the world's commercial aviation industry, based in Montreal, Canada * Aviators Code Initiative, an organization advancing flight safety and professionalism * Aviazione Cobelligerante Italiana, the air force of the Royalist "Badoglio government" in southern Italy during the last years of World War II * IATA airport code for

Alderney Airport Alderney Airport is the only airport on the island of Alderney, Guernsey. Built in 1935, Alderney Airport was the first airport in the Channel Islands. Located on the Blaye ( southwest of St Anne), it is the closest Channel Island airport to t ...

in Guernsey

Businesses and organizations

In education

* Agincourt Collegiate Institute a secondary school located in Toronto, Canada * Albertson College of Idaho, now known as the

College of Idaho The College of Idaho (C of I) is a private liberal arts college in Caldwell, Idaho. Founded in 1891 by Rev. William Judson Boone as a Presbyterian college, it is the state's oldest private liberal arts college and has an enrollment of over ...

, a small liberal-arts college in Idaho *

American Collegiate Institute Founded in 1878, the American Collegiate Institute (), referred to by the acronym ACI, is a Private school, private Mixed-sex education, co-educational Secondary school, high school in Goztepe, İzmir, Turkey. ACI was founded, and is now run, by t ...

, Izmir Amerikan Lisesi, located at İzmir, Turkey

In transportation

Alternate Concepts Alternate Concepts, Inc. (ACI) is a transit management company within the United States. It is currently headquartered in Boston, Massachusetts and provides services to four rail authorities. Between 2003 and 2014, ACI also operated the Massachuse ...

, a transportation management company in the United States

Other businesses and organizations

* ACI (conglomerate), one of the largest Bangladeshi conglomerates *

ACI Worldwide ACI Worldwide is a digital payments software company headquartered in Elkhorn, Nebraska, that processes billions of transactions daily equating to trillions of U.S. dollars for customers in 94 countries. Banks, financial institutions, merchants, ...

, a payments software company *

Adriatic Croatia International Club Adriatic Croatia International Club, commonly referred to as ACI Club or simply ACI, is a Croatian nautical tourism company based in Rijeka which operates a marina chain along the Croatian part of the Adriatic coast. From the initial 16 marinas o ...

, a chain of marinas in Croatia *

Albertsons Albertsons Companies, Inc. is an American grocery company founded and headquartered in Boise, Idaho. With 2,253 stores as of the third quarter of fiscal year 2020 and 270,000 employees as of fiscal year 2019, the company is the second-large ...

Companies, Inc., an American supermarket chain *

American Concrete Institute The American Concrete Institute (ACI, formerly National Association of Cement Users or NACU) is a non-profit technical society and standards developing organization. ACI was founded in January 1905 during a convention in Indianapolis. The Institu ...

, a non-profit standards-developing organization *

American Constitutional Initiative American Constitutional Initiative (commonly known as ACI) is a non-profit advocacy group Advocacy groups, also known as lobby groups, interest groups, special interest groups, pressure groups, or public associations, use various forms of advoc ...

, a non-profit organization that promotes progressive change *

Anti-Corruption Ireland Gemma O'Doherty (born 24 August 1968) is an Irish far-right activist and conspiracy theorist. She began her career as a staff writer for the ''Irish Independent'', contributing articles on travel, the criminal justice system and corruption, but ...

, political group created by Gemma O'Doherty *

Arch Coal Arch Resources, previously known as Arch Coal, was an American coal mining and processing company. The company mined, processed, and marketed bituminous and sub-bituminous coal with low sulfur content in the United States. Arch Resources was the ...

inc., A major U.S. coal mining company *

Aurora Cable Internet Rogers Cable is Canada's largest cable television service provider with about 2.25 million television customers, and over 930,000 Internet subscribers, primarily in Southern and Eastern Ontario, New Brunswick and Newfoundland and Labrador. Roger ...

, a digital cable television, cable internet and VOIP provider in Aurora, Ontario *

Automobile Club d'Italia The Automobile Club d'Italia (usually known by its acronym ACI) is a not-for-profit statutory corporation of the Italian Republic. The club originated through the efforts of Count Carlo Biscaretti di Ruffia as the "Automobile Club of Turin" founde ...

, a member of the Fédération Internationale de l'Automobile

Places

Aci Castello Aci Castello () is a ''comune'' in the Metropolitan City of Catania in Sicily, Italy. Located north of Catania on the Mediterranean coast, the city's primary economic sectors are agriculture and industry (in Catania). The city is surrounded by ...

(Sicilian: Jaci Casteddu), a city and comune in the Province of Catania in Sicily, Italy *

Acı, Pasinler Acı is a neighbourhood in the municipality and district of Pasinler, Erzurum Province Erzurum Province () is a province and metropolitan municipality in the Eastern Anatolia Region of Turkey. Its area is 25,006 km2, and its population i ...

Acireale Acireale (; , locally shortened to ''Jaci'' or ''Aci'') is a coastal city and ''comune'' in the north-east of the Metropolitan City of Catania, Sicily, southern Italy, at the foot of Mount Etna, on the coast facing the Ionian Sea. It is home to ...

, Sicilian city sometimes abbreviated Aci *

Jaci (river) The Jaci or Aci ( or ">nowiki/>; or ; ; ) was a river of Sicily, Italy on the eastern coast of the island, and immediately at the foot of Mount Etna. History It rose under a rock of lava, and had a very short course to the sea at Acireale (anc ...

, also called the Aci

Science and technology

Adjacent-channel interference Adjacent-channel interference (ACI) is interference caused by extraneous power from a signal in an adjacent channel. ACI may be caused by inadequate filtering (such as incomplete filtering of unwanted modulation products in FM systems), improp ...

, power from a signal in an adjacent channel * An alternate name for the

nitronate A nitronate (IUPAC: azinate) in organic chemistry is an anion with the general structure , containing the functional group, where R can be hydrogen, halogen, organyl group or other groups. It is the anion of nitronic acid (sometimes also called ...

moiety *

Application container image Container Linux (formerly CoreOS Linux) is a discontinued open-source lightweight operating system based on the Linux kernel and designed for providing infrastructure for clustered deployments. One of its focuses was scalability. As an operati ...

, a specification for the format and environment of virtualization containers, initiated by CoreOS *

Autologous chondrocyte implantation Autologous chondrocyte implantation (ACI, ATC code ) is a biomedical treatment that repairs damages in articular cartilage. ACI provides pain relief while at the same time slowing down the progression or considerably delaying partial or total jo ...

, a medical treatment for articular cartilage damage * Automatic Car Identification, a railroad barcode system that preceded the

automatic equipment identification Automatic equipment identification (AEI) is an electronic recognition system in use with the North American railroad industry. Consisting of passive tags mounted on each side of rolling stock and active trackside readers, AEI uses RF technology ...

* Cisco Application Centric Infrastructure,

Cisco Cisco Systems, Inc. (using the trademark Cisco) is an American multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, s ...

's implementation of

software-defined networking Software-defined networking (SDN) is an approach to network management that uses abstraction to enable dynamic and programmatically efficient network configuration to create grouping and segmentation while improving network performance and monit ...

Other uses

Accusative and infinitive In grammar, accusative and infinitive (also ''Accusativus cum infinitivo'' or accusative plus infinitive, frequently abbreviated ACI or A+I) is the name for a syntactic construction first described in Latin and Greek, also found in various forms ...

a.k.a. ''accusativus cum infinitivo'', a construction in Latin grammar *'' Ace Combat Infinity'' * Acis (Italian: ''Aci'') of

Acis and Galatea Acis and Galatea (, ) are characters from Greek mythology later associated together in Ovid's ''Metamorphoses''. The episode tells of the love between the mortal Acis and the Nereid (sea-nymph) Galatea; when the jealous Cyclops Polyphemus kil ...

in Greek mythology * ''Air Crash Investigation'', an alternate name for the television series ''

Mayday Mayday is an emergency procedure word used internationally as a distress signal in voice-procedure radio communications. It is used to signal a life-threatening emergency primarily by aviators and mariners, but in some countries local organiz ...

'' * Aka-Cari language, an extinct Great Andamanese language * American Competitiveness Initiative, a federal program intended to help America maintain competitiveness * Assassin's Creed I, the first entry in the long-running

Assassin's Creed ''Assassin's Creed'' is a historical fiction, historical action-adventure video game series and media franchise published by Ubisoft and developed mainly by its studio Ubisoft Montreal using the game engine Anvil (game engine), Anvil and its m ...

series. {{Disambiguation, geo