Since Athens 1896, there have been many changes to the sports on the summer Olympic program. There were 26 sports contested at London 2012 and at Rio 2016 golf and rugby-7s join the program to reach 28. Aquatics, canoe/kayak, cycling, gymnastics, equestrian, volleyball and wrestling have multiple disciplines. Learn more on each sports page.
The first Winter Olympic Games, Chamonix 1924, had six sports on the program and 16 events. Today the number of sports has only increased by one to seven with multiple disciplines in bobsleigh, skating and skiing. At the 2014 Games in Sochi Russia - alpine parrallel team skiing, snowboard and ski slopestyle were added meaning 98 events were contested.
A number of sports previously on the Olympic program have been dropped throughout Games history. Golf and rugby union were discontinued but have been reinstated to the Olympic program for Rio 2016. Baseball and softball were dropped after the 2008 Games.