Look up ati or -ati in Wiktionary, the free dictionary.

Ati or ATI may refer to:

• Ati people, a Negrito ethnic group in the Philippines
  • Ati language (Philippines), the language spoken by this people group
  • Ati-Atihan festival, an annual celebration held in the Philippines
• Ati language (China), an unclassified Loloish language of Huaning County, Yunnan, China
• Ati, a queen of the fabled Land of Punt in Africa
• Ati, Chad, a town in Chad
• Ati, Iran, a village in Khuzestan Province, Iran
• Maha Ati, one of the nine subdivisions of Buddhist Tantra in the Nyingma school

The acronym ATI may refer to:

Academic institutions

• Auckland Technical Institute, now the Auckland University of Technology, Auckland, New Zealand
• Ohio State University Agricultural Technical Institute, known as Ohio State ATI
• An associate of the Tax Institute of Australia

Electronics and information technology

• Acronis True Image, cloning and backup software
• Allied Telesis, a telecommunications company, formerly Allied Telesyn
• Tunisian Internet Agency, also known as ATI (short for Agence tunisienne d'Internet), telecommunications company in Tunisia

Companies

• ATI Inc., an American specialty metals company headquartered in Dallas, Texas
• ATI Technologies, a former Canadian semiconductor company manufacturing GPUs and chipsets

Transportation

• Aero Trasporti Italiani, a defunct Italian airline (ICAO designator)
• Air Transport International, a charter cargo airline
• Artigas Airport, IATA designation

Other uses

• Above threshold ionization, a photoelectrochemical process ionizing an atom by an excessive number of photons
• Access to Insight, a Theravada Buddhist website
• Associated Television International, a production and distribution company
• Astatine monoiodide, a radioactive molecule
• Amylase/trypsin inhibitor, a substance that inhibits the enzymes amylase or trypsin (see Non-celiac gluten sensitivity)