ACI may refer to:
Arts and media Ace Combat Infinity, a combat flight simulation video game Air Crash Investigation, an alternate name for the television series Mayday Assassin's Creed (video game), the first entry in the long-running Assassin's Creed series
Businesses and organizations In aviation Aero Club of India, 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, 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 Alderney Airport in Guernsey (IATA airport code ACI)
In education Agincourt Collegiate Institute, a secondary school in Toronto, Canada Albertson College of Idaho, now known as the College of Idaho, a small liberal-arts college in Idaho American Collegiate Institute, Izmir Amerikan Lisesi, located at İzmir, Turkey
Other businesses and organizations ACI (conglomerate), a Bangladeshi conglomerate ACI Worldwide, a payments software company Adriatic Croatia International Club, a chain of marinas in Croatia Albertsons 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, a political group created by Gemma O'Doherty Arch Coal Inc., a U.S. coal mining company Aurora Cable Internet, a digital cable television, cable internet and VOIP provider in Aurora, Ontario Automobile Club d'Italia, a member of the Fédération Internationale de l'Automobile Allied Communications Inc., a defunct television syndicator
Language Accusative and infinitive a.k.a. accusativus cum infinitivo, a construction in Latin grammar Aka-Cari language, an extinct Great Andamanese language
Places Aci Castello (Sicilian: Jaci Casteddu), a city and comune in the Province of Catania in Sicily, Italy Acı, Pasinler Acireale, Sicilian city sometimes abbreviated Aci Adult Correctional Institutions, facilities operated by the Rhode Island Department of Corrections Alderney Airport in Guernsey (IATA airport code ACI) Jaci (river), also called the Aci
Science and technology Adjacent-channel interference, power from a signal in an adjacent channel The nitronate moiety, alternately called ACI) 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's implementation of software-defined networking
Other uses Anti-Coercion Instrument, a regulation of the European Union aiming to protect the EU and its member states from economic coercion by third countries Acis (Italian: Aci) of Acis and Galatea, in Greek mythology American Competitiveness Initiative, a federal program intended to help America maintain competitiveness