USTOA  is the United States Tour Operator's Association - a trade association which requires it's members to be very financially stable and to have a million dollars or more in funds set aside for consumer protection against defaults. Visit for more information

Other definition:
USTOA is the United States Tour Operators Association. USTOA is a professional association representing the tour operator industry, composed of companies whose tours and packages encompass the entire globe and who conduct business in the U.S.
List of books: USTOA