The United States Tennis Association (USTA) is the national governing body for tennis in the United States. A not-for-profit organization with more than 700,000 members, it invests 100% of its proceeds to promote and develop the growth of tennis, from the grass-roots to the professional levels. The association was created to standardize rules and regulations and to promote and develop the growth of tennis in the United States. The USTA runs the USTA Billie Jean King National Tennis Center which hosts the US Open every year. The USTA has leagues in most places for adults skill levels between beginner and pro. The USTA also hosts tournaments across the country every weekend for club players or professionals. History The USTA was previously known as the United States National Lawn Tennis Association (USNLTA) and was established in 1881 by a small group of tennis club members in New York City and northeastern clubs, where most lawn tennis was played. In 1920 the word 'National' was dropped from the organization's name, making the abbreviation USLTA. In 1975, the word "Lawn" was officially dropped from the name. Organization The USTA has 17 geographical sections with more than 700,000 individual members, 7,000 organizational members, and a professional staff. The USTA (B)team is located in White Plains, NY. The (A) team is located at the National Campus located in Orlando, FL. Geographical sections USTA Caribbean USTA Eastern USTA Florida USTA Hawaii Pacific USTA Intermountain USTA Mid-Atlantic USTA Middle States USTA Midwest USTA Missouri Valley USTA New England USTA Northern USTA Northern California USTA Pacific Northwest USTA Southern USTA Southern California USTA Southwest USTA Texas NTRP Ratings The USTA (along with the USPTA) created the National Tennis Rating Program (NTRP) or more commonly NTRP ratings to place players into various skill levels. NTRP ratings range from the beginner 1.5 with .5 increments all the way up to 7.0 or world-class players. NTRP ratings are used in the leagues and tournaments to help provide more compatible matches. At the end of each calendar year, the USTA calculates and publishes everyone's year-end rating online (http://tennislink.usta.com). Ratings are calculated using a computer algorithm that adjusts ratings based on how actual outcomes compare to expected outcomes for each match. Expected outcomes are determined based on the difference between the ratings in hundredths of the players on the court. How many matches you've won and if it was a singles or doubles