What does US stand for?

What does US mean?

US	Universiteit van Stellenbosch Regional » African
US	Ultra sound Medical » British Medicine
US	Urban Sanctuary Community
US	Urban Success Community
US	United States Regional » Countries
US	Sites in the United States Internet » Domain Names
US	United States Community » Educational
US	Unusually Smart Community » Educational
US	Ultra Short Academic & Science » Electronics
US	Uwe Schmidt Community » Famous
US	Uncle Sam Community » Famous
US	Ultimate Spas Business » Firms
US	U Save Business » General
US	User Services Business » General
US	Unified System Business » General
US	Unit Separator Computing » General
US	UltraSound Medical » Laboratory
US	Unit Standard Medical » Laboratory
US	User Story Community » Media
US	United States Governmental » Military
US	Upper Secondary Governmental » Military
US	Uniform System Governmental » Military
US	Ultimate Service Governmental » NASA
US	Upravlayemyi Sputnik Governmental » NASA
US	Upper Stage Governmental » NASA