This document discusses many popular sports and their basic rules. It provides brief descriptions of team sports like football, basketball, hockey, baseball and cricket. Individual sports such as tennis, golf, gymnastics, skiing, track and field, and ice skating are also mentioned. Some less common sports that have been part of the Olympics are also listed, such as curling, wife carrying, chessboxing, cheese rolling, and underwater hockey. The document closes by noting that sports provide an opportunity for gambling and that the Olympics are a major international sporting event held every four years.