WCO: World Customs Organization
Wetlands: Convention on Wetlands of International Importance
Especially As Waterfowl Habitat
WEU: Western European Union
WFC: World Food Council
WFP: World Food Program
WFTU: World Federation of Trade Unions
Whaling: International Convention for the Regulation of Whaling
WHO: World Health Organization
WIPO: World Intellectual Property Organization
WMO: World Meteorological Organization