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, 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 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, a non-profit standards-developing organization * American Constitutional Initiative, a non-profit organization that promotes progressive change * Anti-Corruption Ireland, political group created by Gemma O'Doherty * Arch Coal inc., A major U.S. coal mining company * Aurora Cable Internet, 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 (Sicilian: Jaci Casteddu), a city and comune in the Province of Catania in Sicily, Italy * Acı, Pasinler *

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), 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 moiety * Application container image, a specification for the format and environment of virtualization containers, initiated by CoreOS * Autologous chondrocyte implantation, a medical treatment for articular cartilage damage * Automatic Car Identification, a railroad barcode system that preceded the automatic equipment identification * 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