A sport is an organized, competitive, entertaining, and skillful activity requiring commitment, strategy, and fair play, in which a winner can be defined by objective means. It is governed by a set of rules or customs. Activities such as card games and board games, are classified as "mind sports" and some are recognized as Olympic sports, requiring primarily mental skills and mental physical involvement. Non-competitive activities, for example as jogging or playing catch are usually classified as forms of recreation.