What does USA stand for?

What does USA mean?

USA	United States of America Governmental » FBI Files
USA	United States of America Governmental » State & Local
USA	United States of America Academic & Science » Libraries
USA	United States of America Governmental » Military
USA	United States of America Governmental » United Nations
USA	United States of America Governmental » Police
USA	United States of America Business » Products
USA	United States of America Academic & Science » Ocean Science
USA	United States of America Miscellaneous » USPS
USA	United States of America Governmental » US Government
USA	United States of America Governmental » NASA
USA	United States of America Governmental » Transportation
USA	United States of America Academic & Science » Geology
USA	United States Army Governmental » US Government
USA	United States Army Governmental » Military
USA	United States Attorney Governmental » FBI Files
USA	Unstable Angina Medical » Physiology
USA	Abdominal Ultrasound Medical » Hospitals
USA	Amerika Birlesik Devletleri International » Turkish
USA	Underground Service Alert Computing » Telecom
USA	Liberty All Star Equity Fund Business » NYSE Symbols
USA	United Stockgrowers of America Miscellaneous » Farming
USA	User Support Analyst Business » Positions
USA	Under Secretary of the Army Governmental » Military
USA	University of Southern Alabama Academic & Science » Universities