What does kya stand for?

thousands of years ago (SAUO)

Khaya Kayaks Inc., Winter Springs, FL - Manufacturer code for watercraft hull identification number (USCG)

Konya - Turkey - Airport symbol (AD)

Kwaya - Language code (ETLW)

Kyakhta - Former USSR - Seismograph station code, US Geological Survey - Closed (SEIS)

Yana Air Cargo (Kenya) Ltd. - ICAO designator (FAAC)

Kenya (MILB)