What does USA stand for?

What does USA mean?

USA	Uneven Surface Argument Academic & Science » Mathematics
USA	United States of America Governmental » Military
USA	Under Secretary of the Army Governmental » Military
USA	United States Army Governmental » Military
USA	United States of America Governmental » NASA
USA	Ultra Simplified Acquisition Governmental » NASA
USA	Upper Stage Adapter Governmental » NASA
USA	United Space Alliance Governmental » NASA
USA	Unicast Source Address Computing » Networking
USA	United Smokers Association Community » Non-Profit Organizations
USA	United Self Assistance Community » Non-Profit Organizations
USA	Liberty All Star Equity Fund Business » NYSE Symbols
USA	United States of America Academic & Science » Ocean Science
USA	Unstable Angina Medical » Physiology
USA	United States of America Governmental » Police
USA	User Support Analyst Business » Positions
USA	Underground Service Atlas Business » Products
USA	United States of America Business » Products
USA	Unlimited Savings Allowance Business » Stock Exchange
USA	Underground Service Alert Computing » Telecom
USA	United States of America Governmental » Transportation
USA	Amerika Birlesik Devletleri International » Turkish
USA	United States of America Governmental » United Nations
USA	United Students for Abstinence Academic & Science » Universities
USA	University of Southern Alabama Academic & Science » Universities