ACI
ACI may refer to:
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
- 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, a small liberal-arts college in Idaho
- American Collegiate Institute, Izmir Amerikan Lisesi, located at İzmir, Turkey
In transportation
- Alternate Concepts, a transportation management company in the United States
Other businesses and organizations
- ACI (conglomerate), one of the largest Bangladeshi conglomerates
- 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, 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, 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, Sicilian city sometimes abbreviated Aci
- Jaci (river), also called the Aci
Science and technology
- Adjacent-channel interference, 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's implementation of software-defined networking
Other uses
- Accusative and infinitive a.k.a. accusativus cum infinitivo, a construction in Latin grammar
- Ace Combat Infinity
- Acis (Italian: Aci) of Acis and Galatea in Greek mythology
- Air Crash Investigation, an alternate name for the television series Mayday
- 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 series.