Executive (government)
In a presidential system, this person (the President) may also be the head of State, but in a parliamentary system, he or she is usually the leader of the largest party in the legislature and is most commonly termed the Prime Minister (Taoiseach in the Republic of Ireland, (Federal) Chancellor in Germany and Austria). In France, executive power is shared between the President and the Prime Minister and this system has been reproduced in a number of former French colonies. Switzerland and Bosnia and Herzegovina have similar systems.