What does YAK stand for?

Yakima - Language code (ETLW)

Yakima - Diocesan abbreviation - Washington (TOCD)

Yakovlev - Russian aircraft symbol; initialism taken from name of aircraft's designer

Yakutat - Alaska - Airport symbol (OAG)

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