The United States Golf Association (USGA) is the United States' national association of golf courses, clubs and facilities and the governing body of golf for the U.S. and Mexico. Together with The R&A, the USGA produces and interprets the rules of golf. The USGA also provides a national handicap system for golfers, conducts 14 national championships, including the U.S. Open, U.S. Women's Open and U.S. Senior Open, and tests golf equipment for conformity with regulations. The USGA Foundation has provided more than $60 million in grants to programs for underprivileged youth and turfgrass research.