AAI may refer to:

Aviation

  • AAI Sparrowhawk, an American two seat pusher ultralight autogyro, available in kit form for amateur construction
  • AAI Corporation Aerosonde, a small unmanned aerial vehicle (UAV) designed to collect weather data over oceans and remote areas
  • Adam Aircraft Industries, a United States company
  • Ahrens Aircraft Inc, an aircraft manufacturer established at Oxnard, California
  • Airports Authority of India, a wing of the ministry of aviation in India
  • Aviation Industries Ilyushin, a Russian company
  • IATA airport code for Arraias Airport in State of Tocantins, Brazil
  • Airline Ambassadors International, a U.S. non-profit organization

Business

  • AAI Corporation, a United States defense company
  • American Athletic Inc., an athletic apparel brand owned by Fruit of the Loom
  • Arlington Asset Investment, a real estate investment trust headquartered in Arlington, Virginia
  • AutoAlliance International, a joint-venture automobile assembly firm co-owned by Ford and Mazda

Education

  • Alliance Academy International, an international school following an American curriculum in Quito, Ecuador
  • Andreyev Acoustics Institute, a Russian research facility dedicated to the study of acoustics
  • Africa-America Institute, CIA run education organisation
  • Angeline Academy of Innovation, a 6-12 school in the United States

Entertainment

  • Aai (film), an Indian Tamil language film starring R. Sarath Kumar, Namitha Kapoor, Vadivelu, Kalabhavan Mani
  • AAI (album), 2021 album by Mouse on Mars
  • Ace Attorney Investigations: Miles Edgeworth, a 2009 spin-off video game that's part of the Ace Attorney series
  • Allied Artists International, an American multinational mass media and entertainment corporation

Non-profit organizations

  • Adım Adım Initiative, a volunteer-based social initiative in Turkey that promotes charitable giving
  • Africa-America Institute, an international organization dedicated to increasing educational opportunity for young Africans and improving global understanding of Africa
  • AIESEC Alumni International, an international project of association for former volunteer members, executive boards, international trainees or staff of AIESEC
  • Airline Ambassadors International, a non-profit organization
  • American Antitrust Institute, an independent Washington-based non-profit education, research, and advocacy organization
  • American Association of Immunologists, a non-profit organization dedicated to advancing the field of immunology
  • Arab American Institute, a non-profit organization based in Washington D.C. that focuses on the issues and interests of Arab-Americans nationwide
  • Architectural Association of Ireland, an organisation dedicated to architecture
  • Asian Arts Initiative, a non-profit organization in Philadelphia
  • Atheist Alliance International, a global network of atheist organizations around the world

Science

  • Alpha amylase inhibitor, a group of proteins that blocks the Enzyme Alpha-Amylase
  • AAI mode of an artificial pacemaker: Atrial chamber paced, Atrial chamber sensed, and Inhibiting response to sensing
  • Atlantoaxial instability, caused by laxity of the transverse ligament of atlas, a ligament which arches across the ring of the atlas (the topmost cervical vertebra, which directly supports the skull)

Sports

  • Associação Atlética Iguaçu, a Brazilian football team from the city of União da Vitória, Paraná state
  • Athletics Ireland (Athletics Association of Ireland), governing body for athletics in Ireland

Technology

  • AAI underwater revolver, an amphibious firearm intended for naval use
  • Authentication and authorization infrastructure, access-control for network content

Other uses

  • Adrenaline autoinjector, a medical device for injecting a measured dose or doses of epinephrine
  • Arifama-Miniafia language, a language of Papua New Guinea
  • Adult Attachment Interview, a method used in attachment theory
  • Automatic Accounting Instructions, programming used by Oracle JD Edwards EnterpriseOne to determine how to distribute amounts associated with journal entries that the system generates.
  • The Aai, a group of Ancient Egyptian deities