Senior Olympics

Five countries — Greece, Great Britain, France, Switzerland, and Australia (twice combined with New Zealand as Australasia) — have been represented at all Summer Olympic Games. The only country to have won at least one gold medal at every Summer Olympic Games is Great Britain, ranging from one gold in 1904, 1952 and 1996 to fifty-six golds in 1908. Qualification rules for each of the Olympic sports are set by the International Sports Federations (IFs) that governs that sport's international competition.
For individual sports, competitors typically qualify through attaining a certain place in a major international event or on the IF's ranking list. National Olympic committees may enter a limited number of qualified competitors in each event, and the NOC decides which qualified competitors to select as representatives in each event if more have attained the benchmark than can be entered. Many events provide for a certain number of wild card entries, given to athletes from developing nations. Nations qualify teams for team sports through continental qualifying tournaments, in which each continental association is given a certain number of spots in the Olympic tournament. The host nation is generally given an automatic qualification.