As of 2015, there are a total of 56 sports in the Olympic games. The number and types of events may change from one Olympiad to another and are subject to change as determined by the International Olympic Committee.
The Olympic games are divided into summer and winter games. The summer games are composed of 41 events, while the winter games have 15 events. The IOC determines a hierarchy of sports and events, and some sports can be subdivided into different disciplines. For example, the skating discipline may be broken down into figure skating and speed skating. Certain sports may be discontinued due to lack of interest or absence of an appropriate governing body.