AY

AY can mean:
*Finnair, IATA airline designator
*Antarctica, DAFIF 0413 / DIA 65-18 / FIPS PUB 10-4 territory code and obsolete NATO digram
*Armenia, WMO country code
*General Instrument AY-3-8910, a computer sound chip common in the 1980s and often referred to as the "AY chip"

Ay can mean:
* Ay, a pharaoh of Ancient Egypt
* Ay kingdom, an ancient dynasty in India
* Murat Ay, a Turkish cartoonist
* Ay, Marne, in the Marne "département", Champagne-Ardenne "région"

ay can mean:
* Aymara language (ISO 639 alpha-2 language code)

Ay is a correct transliteration of Volapük Ä, and ay is correct for ä