The Pan American Games sports comprise all the sports contested in the Summer Olympic Games. In addition, traditional and popular sports throughout the Americas which are not contested at the Olympic Games are also contested such as bowling and baseball. As of 2015, the Pan American Games included 36 sports with 51 disciplines and 364 events. The number and kinds of events may change slightly from one Pan American Games to another. Sports, disciplines, events For purposes of Pan American Games competition, the Pan American Sports Organization (PASO) makes a distinction between sports and disciplines. A sport, in Pan American Games terms, is a single or group of disciplines as represented by an international governing body, namely an International Federation. For example, aquatics, represented at the Olympic level by the International Swimming Federation, is a sport at the Pan American Games that includes the swimming, diving, synchronized swimming and water polo disciplines. Every Summer Olympic discipline is currently on the Pan American Games program. The last such discipline to be added was canoe slalom, which made its debut in 2015 in Toronto, Canada. The discipline had been scheduled to be held at both the 2007 and 2011 Pan American Games, but had been dropped both times due to the small number of competing countries. The Games also include some disciplines which have never been contested at a Summer Olympics. Examples can be found in baseball and softball, now considered a single Pan Am Games sport due to sharing a single international federation. Both were last contested in the Olympics in 2008 and will return in 2020, but baseball has been strictly for men and softball for women. In the Pan Am Games, men's softball has been on the program on several occasions, most recently in 2015; women's baseball made its debut in 2015. Medals are awarded on a per-event basis; there can be one or more events per sport or discipline. In fact, every current Pan American Games discipline has at least two events. Changes The Pan American Games charter establishes that they comprise the program of the Games, the 28 compulsory sports of the program of the Olympic Games plus seven sports recognized by the entity, due to its popularity in the American continent, if a new sport becomes Olympic it is automatically added to the program of the Pan American Games. This only happens, if the number of