AIS can stand for...

• Androgen insensitivity syndrome
• Advanced Info Service, a Thai mobile phone operator
• Automatic Identification System , a system using transponder technology and VHF radio signals to identify, locate and communicate with aircraft or ships
• The Australian Institute of Sport
• Islamic Salvation Army (in French), the former military wing of the Islamic Salvation Front in Algeria
• An ais is a vertical board in the service end of a jeu quarré real tennis court.
• Artificial immune system
• Alltel Information Services