Ai or A.I. may refer to:
Animals
- Ai (chimpanzee)
- Ai (sloth) or maned sloth, a sloth found in Brazil
Computing
- Artificial intelligence, intelligence of machines and robots
- .ai, a top-level Internet domain
- Adobe Illustrator, a vector graphics editor
- .ai, a filename extension for Adobe Illustrator Artwork files
Film
- A.I. Artificial Intelligence, a 2001 American film
- Ai (2015 film), an Indian film, initial title Ai
Places
- Anguilla, a country by ISO 3166-1 code
- Ai (Bible), Canaanite city
- Ai, Alabama
- Ai, Georgia, United States
- Ai, North Carolina
- Ai, Ohio
- Appenzell Innerrhoden, a Swiss canton
Medicine and biology
- Accommodative insufficiency, an eye disorder
- Active ingredient, part of a drug or pesticide
- Adequate intake, a Dietary Reference Intake nutritional parameter
- Amelogenesis imperfecta, a tooth disorder
- Aortic insufficiency, a heart disorder
- Aromatase inhibitor, a class of drugs
- Articulation Index, a method of measuring hearing loss
- Artificial insemination, a method of fertilisation
Music
- A.i. (band)
- Ai (album)
Organizations
- Accuracy International, a firearms manufacturer
- Air India, an Indian airline based in Delhi
- Alitalia, the flag carrier airline of Italy
- Alexis I. duPont High School, Delaware, U.S.
- Amnesty International, a human rights organisation
- Appraisal Institute, an association of real estate appraisers
- The Art Institutes, a chain of art schools
People
- King Ai of Zhou (died 441 BC)
- Emperor Ai of Han (27-1 BC)
- Emperor Ai of Jin (341-365)
- Emperor Ai of Tang (892–908)
- Ai (poet) (1947–2010), American poet
- Ai (singer) (born 1981)
- Allen Iverson (born 1975), American retired professional basketball player; often referred to by his initials, A.I.
Other uses
- Ai (surname), a Chinese surname
- Ai (given name), a given name and list of people and characters with the name
- Ái, a Norse mythological figure
- AI: The Somnium Files, a video game
- The American Interest, a bimonthly magazine
- Ad interim, a phrase in job titles
- Attitude indicator, a flight instrument
- Air interdiction, a military capability
- Appreciation Index, a measure of programme approval
- Appreciative inquiry, an organizational development method
- Automatic Maximum-Aperture Indexing, a form of aperture coupling on Nikon lenses
- Ai, a concept of love in China
- All inclusive, a service at a vacation resort, which includes at a minimum lodging, three meals daily, soft drinks, most alcoholic drinks, gratuities, and possibly other services in the price
See also
- Agios (disambiguation) (colloquially "Ai"), a Greek word for "saint"
- Ai River (disambiguation), several rivers of that name
- Ai Toyon, the Yakut god of light
- Artificial intelligence (disambiguation)
- AY (disambiguation)