Hockey is any of a family of sport in which two teams compete by trying to maneuver a puck. A hard, round disc. Into the opponent's net or goal, using a hockey stick. The dominant version of hockey in a particular region tends to be known simply as hockey, other forms being more fully qualified. There are two teams of skaters consisting of a goaltender, two defence players and three forwards. The game is played all over North America, Europe and in many other countries around the world to a greater or lesser extent and hockey is played in over sixty countries. In NHL rules, the periods are 20 minutes long. There are three periods. North America’s National Hockey League (NHL) is the strongest professional ice hockey league, drawing top ice hockey players from around the globe. The NHL rules are slightly different from those used in Olympic hockey. The 64-member governing body is the International Ice Hockey Federation, (IIHF). Ice hockey has been played at the Winter Olympics since 1924, and was in the 1920 Summer Olympics. There are early representations and reports of hockey-type games being played on ice in the Netherlands, and reports from Canada from the beginning of the nineteenth century, but the modern game was initially organized by students at McGill University, Montreal in 1875 and, by two years later, codified the first set of ice hockey rules and organized the first teams. The word “hockey” comes from the old French word “hocquet”.