What does AYI stand for?

Academic Year Institute - National Science Foundation

Acuity Brands - Company symbol

Adventure Yachts Inc., North Seattle, WA - Manufacturer code for watercraft hull identification number (USCG)

Angle of Yaw Indicator

Antony Resources - Vancouver Stock Exchange symbol

Kiln, MS - Location identifier - FAA (FAAL)

Leyigha - Language code (ETLW)

Yari - Colombia - Airport symbol (OAG)