What does WAH stand for?

Wage and Hour Division - Department of Labor (IAA)

Wahluke - Washington - Seismograph station code, US Geological Survey (SEIS)

Walam - NCIC firearms make code (NCIC)

Washington, MO - Amtrak rail station code

Watubela - Language code (ETLW)

WestAir Holding (EFIS)

Womack Army Hospital Medical Library, Fort Bragg, NC - OCLC symbol (OCLC)