Ten-pin bowling which govern the sport and have predominant influence over its rules. These two central bodies are based in the United Kingdom and the United States, but their influence and ascendant ruling are highly respected globally and are projected worldwide. Additionally, there is the World Tenpin Bowling Association (WTBA), a part of the WB organization, which governs the sport of tenpin bowling throughout the world of which is divided in three zones; the American Zone, Asian Zone and European Zone. In England, ten-pin bowling is sanctioned and governed by the BTBA (British Tenpin Bowling Association). The BTBA is devoted to the
Ten-pin bowling have a decimal component (numbers to the right of the decimal point) discard all numbers to the right of the decimal point, leaving only a whole number, as rounding any decimal number equal or higher than 0.500, "up" to the next highest whole number when calculating averages is prohibited by USBC rules on scoring in tenpins. As of the 2014–15 season, approximately 1.57 million people compete in bowling leagues in the United States. At its peak in 1980, over eight million men and women competed in leagues throughout the United States. In ten-pin bowling there are two major world organizations