| Acronym | Definition |
|---|
| AIS | Automatic Identification System (radio navigation) |
| AIS | Australian Institute of Sport |
| AIS | Androgen Insensitivity Syndrome |
| AIS | American International School |
| AIS | Automated Information System(s) |
| AIS | Association of Interior Specialists (also seen as AOIS) |
| AIS | Advanced Information Systems (Boeing Corporation) |
| AIS | Account Information Security |
| AIS | As I Said |
| AIS | Association for Information Systems (international, for exchange of info about information systems) |
| AIS | Accounting Information System |
| AIS | Administrative Information Services |
| AIS | Artificial Immune System |
| AIS | Aeronautical Information Service |
| AIS | Alarm Indication Signal (UNI Fault Management) |
| AIS | Adolescent Idiopathic Scoliosis |
| AIS | Academic Intervention Services |
| AIS | Abbreviated Injury Scale (accident analysis) |
| AIS | Adenocarcinoma in Situ |
| AIS | Associazione Italiana Sommeliers (Italian Professional Wine Stewards Association) |
| AIS | Australian International School |
| AIS | Associate in Insurance Services |
| AIS | Automated Identification System |
| AIS | Advanced Interactive Systems (Seattle, WA, USA) |
| AIS | American Iris Society |
| AIS | Atlanta International School |
| AIS | Application Interface Specification |
| AIS | Adaptation et Intégration Scolaire (French: Adaptation and Integration School) |
| AIS | American Institute of Stress |
| AIS | Automatic Information System |
| AIS | Agence Immobilière Sociale (French: Social Real Estate; Luxembourg) |
| AIS | Agro Ingreso Seguro |
| AIS | Air Injection System (Yamaha) |
| AIS | Air-Insulated Switchgear (Siemens AG) |
| AIS | Administrative Information System |
| AIS | Aeronautical Information System |
| AIS | American Indian Services |
| AIS | Airborne Imaging Spectrometer |
| AIS | Apples in Stereo (band) |
| AIS | Association Internationale de Sociologie (French: International Sociological Association) |
| AIS | Automated Information Security |
| AIS | Arbeitgeber-Informations-Service |
| AIS | Automatic Intercept System |
| AIS | Address Information Systems (USPS) |
| AIS | Advanced Information System |
| AIS | Asociación Internacional de Sociologia (Spanish: International Sociological Association) |
| AIS | Alltel Information Services |
| AIS | Association of Imaging Service Bureaus |
| AIS | Applied Information Sciences, Inc. |
| AIS | Automatic Indexing-Shutter (photography) |
| AIS | Anti-Inflammatoires Stéroïdiens (French: Anti-Inflammatory Steroids) |
| AIS | Assured Information Security (Rome, NY) |
| AIS | Ateliers de l'Image et du Son (French: Image and Sound Workshops) |
| AIS | Air Intelligence Squadron |
| AIS | Avionics Intermediate Shop |
| AIS | Air Interface Specification |
| AIS | Airborne Instrumentation System |
| AIS | Abu-Dhabi International School (Abu Dhabi, UAE) |
| AIS | Automatic Idle Speed Motor |
| AIS | Army Information System |
| AIS | Alarm Indicator Signal |
| AIS | American Ivy Society (Naples, Florida) |
| AIS | Affiliate Information System |
| AIS | Airborne Instrumentation Subsystem |
| AIS | Accrued Income Scheme (UK) |
| AIS | Annual Inspection Summary |
| AIS | Acceptable Intake for Subchronic Exposure |
| AIS | Alarm Indication System |
| AIS | Ambient Information Systems (workshop) |
| AIS | Anti Icing System |
| AIS | Automated Insolvency System |
| AIS | Advanced Instrument School (Will Rodger World Airport, Oklahoma City, OK) |
| AIS | Alabama Institutional Serial Number (penal system identifier) |
| AIS | Ass in Seat |
| AIS | Aircraft Instrumentation Subsystem |
| AIS | Application Integration Support |
| AIS | Academic Instructor School |
| AIS | Auto Immune System (procedure automation; Fujitsu Siemens Computers, Inc.) |
| AIS | American Institutional Services |
| AIS | Advanced Isotope Separation |
| AIS | Alarm Inhibit Signal (Sprint) |
| AIS | Advanced Identification System |
| AIS | Accident Investigation Site |
| AIS | Additional Information Specification |
| AIS | Acoustic Imaging System |
| AIS | Accumulator Injection System |
| AIS | Applied Information System |
| AIS | Alarm Insertion Signal (SONET/SDH) |
| AIS | Adaptive Interference Suppression |
| AIS | Account Information Summary |
| AIS | American Interdisciplinary Studies |
| AIS | Accident Information Sheet |
| AIS | ABCs Information Services |
| AIS | Advanced Informations Services |
| AIS | Acoustic Intercept System |
| AIS | Avionics Integrated Support |
| AIS | Affiliate and Immigration Services |
| AIS | Applicant Inventory System |
| AIS | Adaptive Infrastructure Strategy |
| AIS | Architecture Integration Study |
| AIS | Asbestos Information System |
| AIS | Automated Import Systems |
| AIS | Age in Service (age composition of a company's labor force) |
| AIS | Automated Intelligence System |
| AIS | Airborne Intelligence System |
| AIS | Alien Internet Services |
| AIS | Airborne Intercept System |
| AIS | Alien Internet Services (Internet Media business in Australia) |
| AIS | Aciers Inoxydables Spéciaux (French: Special Stainless Steel) |
| AIS | Academy of International Studies at Woodburn (Woodburn, OR) |
| AIS | Allergy Information Statement (food label) |
| AIS | Accountable Instruction System |
| AIS | Ace Investigations & Security |
| AIS | Adversary Information Systems |
| AIS | Acid Injection System |
| AIS | APCE Interface Set |
| AIS | American Installation Services |
| AIS | Adventures in Suburbia (band) |
| AIS | Agence Intégrale de Services (French: Complete Agency Services) |
| AIS | Admissions Intake Specialist |
| AIS | Advanced Indication System |
| AIS | Advanced Infantry School |
| AIS | Audio Intercommunications System |
| AIS | Auto Initiate Sector |
| AIS | Annual Inventory Inspection |
| AIS | Automatic Interval Selection |
| AIS | Autonomous Intelligence Submunitions |
| AIS | Archive Index System |
| AIS | Antenna Interface System/Subsystem |
| AIS | Alternate Interim Successor |
| AIS | ADN Interface Simulator |
| AIS | Arize Informatique Services (French computer technology retailer) |
| AIS | Accredited Integrated Specialist |
| AIS | Aquatic Invasive Species |
| AIS | American Industrial Systems, Inc. (Irvine, CA) |
| AIS | Auto Insurance Specialists (various locations) |
| AIS | Adaptive Immune System |
| AIS | American Interplanetary Society (est. 1930; science fiction) |
| AIS | Advanced Infrastructure Solutions (various organizations) |
| AIS | Alien Invasive Species (biological diversity) |
| AIS | Affordable Internet Solutions (various locations) |
| AIS | Artificial Intelligence System |
| AIS | Advisory Investment Service (various locations) |
| AIS | Artist in Schools (various locations) |
| AIS | American Institute for Stuttering (New York, NY) |