What does WO stand for?

What does WO mean?

WO	Work Order Governmental » NASA
WO	Wash Out Miscellaneous » Unclassified
WO	War Objects Miscellaneous » Unclassified
WO	White Out Miscellaneous » Unclassified
WO	World Office Governmental » United Nations
WO	White Oak Campus Governmental » FDA
WO	Warrant Officer - Army, Navy, USCG, USMC Governmental » Military
WO	week of Medical » British Medicine
WO	weeks old Medical » British Medicine
WO	Welsh office Medical » British Medicine
WO	wife of Medical » British Medicine