Medicare is a social insurance program that serves more than 44 million enrollees (as of 2008). The program costs about $432 billion, or 3.2% of GDP, in 2007.
The definition of an institution is an established custom or practice, or a group of people that was formed for a specific reason or a building that houses the group of people. 1  Marriage is an example of a cultural institution. 2  A town council is an example of an institution of government.
An organization or organisation (see spelling differences) is an entity comprising multiple people, such as an institution or an association, that has a collective goal and is linked to an external environment.The word is derived from the Greek word organon, which means organ.n organization or organisation (see spelling differences) is an entity comprising multiple people, such as an institution or an association, that has a collective goal and is linked to an external environment. The word is derived from the Greek word organon, which means organ.